Omega - Seamaster Day-Date - No reserve price - 166.0278 - Men - 1970-1979
03
days
22
hours
23
minutes
21
seconds
Current bid
€ 345
No reserve price
Expert
Selected by Erwin Dekker
Experienced antique dealer with extensive watch collecting expertise and antiques background.
Estimate € 750 - € 850
 | €345 | |
|---|---|---|
 | €325 | |
| €285 | |
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This vintage Omega Seamaster Automatic, reference 166.0278, is estimated to date from the 1970s to early 1980s and features an automatic movement, a 34 mm stainless-steel case and a repainted turquoise-green dial.
AI-assisted summary
Description from the seller
Omega Seamaster Automatic 166.0278 – 34 mm – Turquoise Green Dial – Day and Date Display – Vintage
A distinctive vintage Omega Seamaster Automatic, reference 166.0278, featuring a classic 34 mm stainless steel case and an attractive turquoise-green dial.
This model combines the elegant design of the Seamaster collection with applied silver-tone baton hour markers, slender hands, and a framed day and date window at 3 o’clock.
The vibrant green dial is particularly eye-catching and has a subtle metallic sheen that changes appearance depending on the light.
The watch is powered by an automatic Omega 1000-series movement and features the traditional Seamaster hippocampus emblem on the stainless steel case back.
The watch is fitted with a replacement black leather strap with an embossed crocodile pattern and a polished silver-tone buckle.
The automatic movement is running and has been checked with a timegrapher. The readings are visible in the photos.
---
Basic Information
- Brand: Omega
- Collection: Seamaster
- Model: Seamaster Automatic Day-Date
- Reference: 166.0278
- Additional case reference: 366.0878
- Case diameter: 34 mm
- Case material: Stainless steel
- Estimated production period: 1970s to early 1980s
- Dial: Turquoise green
- Movement: Automatic mechanical
- Caliber designation: Omega 1022
- Functions: Hours, minutes, central seconds hand, day and date
- Crystal: Domed watch crystal
- Crown: Omega logo
- Watch strap: Replacement black leather strap
- Buckle: Silver-tone Omega-style pin buckle
- Case back: Solid stainless steel with Seamaster hippocampus emblem
- Water resistance: Not tested
---
Key Features
This Omega Seamaster has the characteristic design style of Omega’s vintage automatic watches.
The turquoise-green dial gives it a distinctive appearance and is beautifully complemented by applied silver-tone hour markers and slender baton hands.
A framed day and date window is located at 3 o’clock.
The applied Omega symbol and OMEGA inscription are below the 12 o’clock position.
The elegant Seamaster signature and AUTOMATIC inscription are above the 6 o’clock position.
The polished stainless steel case has a classic round design with elegantly shaped lugs.
The black leather strap provides a refined contrast to the striking green dial and polished case.
---
Estimated Production Year
Estimated production period: 1970s to early 1980s.
Likely period: Circa 1975–1982.
The Omega Seamaster reference 166.0278 belongs to a generation of automatic Seamaster watches with a day and date display associated with the 1970s and early 1980s.
The case design, day and date function, and Omega 1000-series movement are consistent with this period.
The following reference markings are present on the inside of the case back:
166.0278.204 / 366.0878.204
Without a confirmed date based on the serial number or original dated documentation, the exact production year of this particular watch cannot be established.
The stated production period is therefore an estimate.
---
Watch Case
- Diameter: 34 mm, excluding the crown
- Material: Stainless steel
- Shape: Round
- Finish: Predominantly polished
- Lugs: Elegantly shaped and tapered
- Case back: Solid stainless steel
The watch has a polished stainless steel case with the elegant proportions characteristic of vintage Omega Seamaster models.
The 34 mm diameter gives the watch a classic and understated appearance.
The case features smoothly integrated lugs and a polished bezel that pairs beautifully with the turquoise-green dial.
The stainless steel surfaces show normal signs of age and use.
Fine scratches, superficial marks, and small scuffs are visible on the bezel, lugs, and sides of the case.
Some more noticeable scratches are present around the crown.
The case has retained its characteristic vintage shape and appearance.
---
Dial
- Color: Turquoise green
- Finish: Subtle metallic sheen
- Hour markers: Applied silver-tone baton indices
- Hands: Silver-tone baton hands
- Seconds: Central seconds hand
- Day and date display: Framed window at 3 o’clock
- Minute track: Printed around the outer edge
The turquoise-green dial is the most distinctive feature of this Omega Seamaster.
Its vibrant color changes subtly depending on the light, with the dial shifting from a deeper emerald-green appearance to a brighter turquoise shade.
Applied silver-tone baton hour markers surround the dial.
The markers have dark details in the center, providing contrast against the green background.
The slender silver-tone hands complement the hour markers and preserve the balanced design.
The framed day and date window is located at 3 o’clock.
The applied Omega symbol and OMEGA inscription are below the 12 o’clock position.
The elegant Seamaster signature and AUTOMATIC inscription are above the 6 o’clock position.
A fine minute track runs around the dial.
The dial shows light age-related marks and small imperfections, particularly in certain areas of the outer edge and near the minute track.
The hour markers, hands, and printed inscriptions remain clearly visible.
Overall, the dial has an attractive appearance, with its distinctive green color giving the watch plenty of character.
---
Movement
- Movement family: Omega 1000 series
- Visible caliber designation: Omega 1022
- Type: Automatic mechanical
- Winding: Automatic
- Frequency: 28,800 vibrations per hour
- Functions: Hours, minutes, central seconds hand, day and date
The watch is fitted with an automatic Omega movement featuring the characteristic copper-colored finish known from the 1000-series movements.
The movement is visible in the photos showing the case back removed.
The automatic winding rotor features a large Omega symbol.
The Omega signature and caliber designation 1022 are visible on the movement bridge.
Another visible part of the movement is marked as having 17 jewels.
Because the visible caliber designation and the stated jewel count do not fully correspond with the commonly published specifications for caliber 1022, the exact movement configuration has not been independently confirmed.
The automatic movement is running and has been checked using a timegrapher.
No documented recent full service or complete service history is available.
---
Timegrapher Readings
The movement was checked with a Weishi multifunction timegrapher.
The photo shows the following readings:
- Rate: +6 seconds per day
- Amplitude: 264°
- Beat error: 0.5 ms
- Frequency: 28,800 vibrations per hour
- Set lift angle: 52°
The measured rate of +6 seconds per day indicates that, in the tested position at the time of measurement, the watch showed a relatively small daily deviation.
The amplitude and beat error are also visible in the photos.
These readings reflect the movement’s performance at the time of testing.
Actual accuracy during daily use may vary depending on wearing position, level of winding, temperature, and other factors.
A timegrapher reading does not replace a full movement inspection and does not guarantee future accuracy.
---
Crown
The watch is fitted with a fluted stainless steel crown bearing the Omega logo.
The crown complements the polished case and contributes to the Seamaster’s classic appearance.
Light scratches and normal signs of use are visible on the crown and the surrounding parts of the case.
---
Case Back
The watch has a solid stainless steel case back with the traditional Seamaster hippocampus emblem, also known as the seahorse.
The central medallion shows the characteristic seahorse associated with the Omega Seamaster collection.
The surrounding stainless steel surface has a brushed finish with polished details.
Normal scratches and superficial signs of use are visible.
The following Omega Watch Co. signature and inscriptions are present on the inside of the case back:
ACIER INOXYDABLE
FAB. SUISSE
SWISS MADE
The following reference markings are also present:
166.0278.204
366.0878.204
The internal markings and construction are visible in the supplied photos.
---
Leather Watch Strap
The watch is fitted with a replacement black leather strap with an embossed crocodile pattern.
- Material: Leather
- Color: Black
- Pattern: Embossed crocodile pattern
- Stitching: Black
- Buckle: Silver-tone pin buckle
- Buckle design: Omega-style symbol
- Originality: Replacement watch strap
The leather strap complements the watch’s vintage appearance and provides a classic contrast to the polished stainless steel case and vibrant green dial.
The leather shows light creasing and normal signs of use.
The polished buckle features an Omega-style symbol. The originality of the buckle has not been independently confirmed.
The leather watch strap is a replacement and is not the original strap supplied with the watch when new.
---
Water Resistance
The Omega Seamaster collection was originally developed with particular attention to water-resistant construction.
However, the original water-resistant properties of a vintage watch should not be taken for granted after several decades.
This watch has not been pressure tested.
Water resistance therefore cannot be guaranteed.
The watch should be protected from water and moisture unless it has been professionally inspected and tested for water resistance.
---
Included in the Sale
- Omega Seamaster Automatic, reference 166.0278
- Replacement black leather watch strap
- Silver-tone Omega-style pin buckle
No original Omega box, warranty card, or service documentation is listed as included.
The watch in the photos is the actual item being offered.
---
Condition Summary
Case: Good used vintage condition, with fine scratches, small marks, and normal signs of use.
Bezel: Polished stainless steel with superficial scratches.
Crystal: Domed watch crystal with light visible signs of use. No clearly visible major cracks can be seen in the photos.
Dial: Attractive turquoise-green dial with light age-related marks and small imperfections along certain areas of the outer edge.
Hands and hour markers: Silver-tone hands and applied baton hour markers with light signs of age.
Day and date display: Framed day and date window at 3 o’clock. The setting functions have not been separately documented as tested.
Crown: Omega logo, with light signs of use.
Movement: Running automatic Omega movement, checked with a timegrapher. See the movement description for further information about the visible caliber designation and jewel count.
Case back: Stainless steel with Seamaster hippocampus emblem and visible signs of use.
Leather strap: Replacement black leather watch strap with embossed crocodile pattern.
Buckle: Polished silver-tone Omega-style pin buckle.
---
Overall Condition and Conclusion
A distinctive vintage Omega Seamaster Automatic, reference 166.0278, featuring a classic 34 mm stainless steel case and an attractive turquoise-green dial.
The combination of the vibrant green dial, polished silver-tone hour markers, and elegant case design gives the watch a striking appearance.
The framed day and date window at 3 o’clock is a practical addition, while preserving the balanced design style of the Seamaster collection.
The watch shows normal vintage signs of use, including fine scratches on the case, bezel, and case back.
The dial has an attractive appearance, with light age-related marks and small imperfections visible on close inspection.
The automatic movement is running and has been checked with a timegrapher. In the tested position, it measured a rate of +6 seconds per day, with an amplitude of 264° and a beat error of 0.5 ms.
The watch is fitted with a replacement black leather strap and a polished silver-tone Omega-style buckle.
Overall, this is an attractive vintage Omega Seamaster with a distinctive turquoise-green dial, an elegant stainless steel case, and an automatic mechanical movement.
The combination of classic proportions and the dial’s vibrant color makes this an interesting example within Omega’s vintage Seamaster collection.
Please review all photos carefully for a complete picture of the watch’s condition, details, and visible signs of age and use.
Omega Seamaster Automatic 166.0278 – 34 mm – Turquoise Green Dial – Day and Date Display – Vintage
A distinctive vintage Omega Seamaster Automatic, reference 166.0278, featuring a classic 34 mm stainless steel case and an attractive turquoise-green dial.
This model combines the elegant design of the Seamaster collection with applied silver-tone baton hour markers, slender hands, and a framed day and date window at 3 o’clock.
The vibrant green dial is particularly eye-catching and has a subtle metallic sheen that changes appearance depending on the light.
The watch is powered by an automatic Omega 1000-series movement and features the traditional Seamaster hippocampus emblem on the stainless steel case back.
The watch is fitted with a replacement black leather strap with an embossed crocodile pattern and a polished silver-tone buckle.
The automatic movement is running and has been checked with a timegrapher. The readings are visible in the photos.
---
Basic Information
- Brand: Omega
- Collection: Seamaster
- Model: Seamaster Automatic Day-Date
- Reference: 166.0278
- Additional case reference: 366.0878
- Case diameter: 34 mm
- Case material: Stainless steel
- Estimated production period: 1970s to early 1980s
- Dial: Turquoise green
- Movement: Automatic mechanical
- Caliber designation: Omega 1022
- Functions: Hours, minutes, central seconds hand, day and date
- Crystal: Domed watch crystal
- Crown: Omega logo
- Watch strap: Replacement black leather strap
- Buckle: Silver-tone Omega-style pin buckle
- Case back: Solid stainless steel with Seamaster hippocampus emblem
- Water resistance: Not tested
---
Key Features
This Omega Seamaster has the characteristic design style of Omega’s vintage automatic watches.
The turquoise-green dial gives it a distinctive appearance and is beautifully complemented by applied silver-tone hour markers and slender baton hands.
A framed day and date window is located at 3 o’clock.
The applied Omega symbol and OMEGA inscription are below the 12 o’clock position.
The elegant Seamaster signature and AUTOMATIC inscription are above the 6 o’clock position.
The polished stainless steel case has a classic round design with elegantly shaped lugs.
The black leather strap provides a refined contrast to the striking green dial and polished case.
---
Estimated Production Year
Estimated production period: 1970s to early 1980s.
Likely period: Circa 1975–1982.
The Omega Seamaster reference 166.0278 belongs to a generation of automatic Seamaster watches with a day and date display associated with the 1970s and early 1980s.
The case design, day and date function, and Omega 1000-series movement are consistent with this period.
The following reference markings are present on the inside of the case back:
166.0278.204 / 366.0878.204
Without a confirmed date based on the serial number or original dated documentation, the exact production year of this particular watch cannot be established.
The stated production period is therefore an estimate.
---
Watch Case
- Diameter: 34 mm, excluding the crown
- Material: Stainless steel
- Shape: Round
- Finish: Predominantly polished
- Lugs: Elegantly shaped and tapered
- Case back: Solid stainless steel
The watch has a polished stainless steel case with the elegant proportions characteristic of vintage Omega Seamaster models.
The 34 mm diameter gives the watch a classic and understated appearance.
The case features smoothly integrated lugs and a polished bezel that pairs beautifully with the turquoise-green dial.
The stainless steel surfaces show normal signs of age and use.
Fine scratches, superficial marks, and small scuffs are visible on the bezel, lugs, and sides of the case.
Some more noticeable scratches are present around the crown.
The case has retained its characteristic vintage shape and appearance.
---
Dial
- Color: Turquoise green
- Finish: Subtle metallic sheen
- Hour markers: Applied silver-tone baton indices
- Hands: Silver-tone baton hands
- Seconds: Central seconds hand
- Day and date display: Framed window at 3 o’clock
- Minute track: Printed around the outer edge
The turquoise-green dial is the most distinctive feature of this Omega Seamaster.
Its vibrant color changes subtly depending on the light, with the dial shifting from a deeper emerald-green appearance to a brighter turquoise shade.
Applied silver-tone baton hour markers surround the dial.
The markers have dark details in the center, providing contrast against the green background.
The slender silver-tone hands complement the hour markers and preserve the balanced design.
The framed day and date window is located at 3 o’clock.
The applied Omega symbol and OMEGA inscription are below the 12 o’clock position.
The elegant Seamaster signature and AUTOMATIC inscription are above the 6 o’clock position.
A fine minute track runs around the dial.
The dial shows light age-related marks and small imperfections, particularly in certain areas of the outer edge and near the minute track.
The hour markers, hands, and printed inscriptions remain clearly visible.
Overall, the dial has an attractive appearance, with its distinctive green color giving the watch plenty of character.
---
Movement
- Movement family: Omega 1000 series
- Visible caliber designation: Omega 1022
- Type: Automatic mechanical
- Winding: Automatic
- Frequency: 28,800 vibrations per hour
- Functions: Hours, minutes, central seconds hand, day and date
The watch is fitted with an automatic Omega movement featuring the characteristic copper-colored finish known from the 1000-series movements.
The movement is visible in the photos showing the case back removed.
The automatic winding rotor features a large Omega symbol.
The Omega signature and caliber designation 1022 are visible on the movement bridge.
Another visible part of the movement is marked as having 17 jewels.
Because the visible caliber designation and the stated jewel count do not fully correspond with the commonly published specifications for caliber 1022, the exact movement configuration has not been independently confirmed.
The automatic movement is running and has been checked using a timegrapher.
No documented recent full service or complete service history is available.
---
Timegrapher Readings
The movement was checked with a Weishi multifunction timegrapher.
The photo shows the following readings:
- Rate: +6 seconds per day
- Amplitude: 264°
- Beat error: 0.5 ms
- Frequency: 28,800 vibrations per hour
- Set lift angle: 52°
The measured rate of +6 seconds per day indicates that, in the tested position at the time of measurement, the watch showed a relatively small daily deviation.
The amplitude and beat error are also visible in the photos.
These readings reflect the movement’s performance at the time of testing.
Actual accuracy during daily use may vary depending on wearing position, level of winding, temperature, and other factors.
A timegrapher reading does not replace a full movement inspection and does not guarantee future accuracy.
---
Crown
The watch is fitted with a fluted stainless steel crown bearing the Omega logo.
The crown complements the polished case and contributes to the Seamaster’s classic appearance.
Light scratches and normal signs of use are visible on the crown and the surrounding parts of the case.
---
Case Back
The watch has a solid stainless steel case back with the traditional Seamaster hippocampus emblem, also known as the seahorse.
The central medallion shows the characteristic seahorse associated with the Omega Seamaster collection.
The surrounding stainless steel surface has a brushed finish with polished details.
Normal scratches and superficial signs of use are visible.
The following Omega Watch Co. signature and inscriptions are present on the inside of the case back:
ACIER INOXYDABLE
FAB. SUISSE
SWISS MADE
The following reference markings are also present:
166.0278.204
366.0878.204
The internal markings and construction are visible in the supplied photos.
---
Leather Watch Strap
The watch is fitted with a replacement black leather strap with an embossed crocodile pattern.
- Material: Leather
- Color: Black
- Pattern: Embossed crocodile pattern
- Stitching: Black
- Buckle: Silver-tone pin buckle
- Buckle design: Omega-style symbol
- Originality: Replacement watch strap
The leather strap complements the watch’s vintage appearance and provides a classic contrast to the polished stainless steel case and vibrant green dial.
The leather shows light creasing and normal signs of use.
The polished buckle features an Omega-style symbol. The originality of the buckle has not been independently confirmed.
The leather watch strap is a replacement and is not the original strap supplied with the watch when new.
---
Water Resistance
The Omega Seamaster collection was originally developed with particular attention to water-resistant construction.
However, the original water-resistant properties of a vintage watch should not be taken for granted after several decades.
This watch has not been pressure tested.
Water resistance therefore cannot be guaranteed.
The watch should be protected from water and moisture unless it has been professionally inspected and tested for water resistance.
---
Included in the Sale
- Omega Seamaster Automatic, reference 166.0278
- Replacement black leather watch strap
- Silver-tone Omega-style pin buckle
No original Omega box, warranty card, or service documentation is listed as included.
The watch in the photos is the actual item being offered.
---
Condition Summary
Case: Good used vintage condition, with fine scratches, small marks, and normal signs of use.
Bezel: Polished stainless steel with superficial scratches.
Crystal: Domed watch crystal with light visible signs of use. No clearly visible major cracks can be seen in the photos.
Dial: Attractive turquoise-green dial with light age-related marks and small imperfections along certain areas of the outer edge.
Hands and hour markers: Silver-tone hands and applied baton hour markers with light signs of age.
Day and date display: Framed day and date window at 3 o’clock. The setting functions have not been separately documented as tested.
Crown: Omega logo, with light signs of use.
Movement: Running automatic Omega movement, checked with a timegrapher. See the movement description for further information about the visible caliber designation and jewel count.
Case back: Stainless steel with Seamaster hippocampus emblem and visible signs of use.
Leather strap: Replacement black leather watch strap with embossed crocodile pattern.
Buckle: Polished silver-tone Omega-style pin buckle.
---
Overall Condition and Conclusion
A distinctive vintage Omega Seamaster Automatic, reference 166.0278, featuring a classic 34 mm stainless steel case and an attractive turquoise-green dial.
The combination of the vibrant green dial, polished silver-tone hour markers, and elegant case design gives the watch a striking appearance.
The framed day and date window at 3 o’clock is a practical addition, while preserving the balanced design style of the Seamaster collection.
The watch shows normal vintage signs of use, including fine scratches on the case, bezel, and case back.
The dial has an attractive appearance, with light age-related marks and small imperfections visible on close inspection.
The automatic movement is running and has been checked with a timegrapher. In the tested position, it measured a rate of +6 seconds per day, with an amplitude of 264° and a beat error of 0.5 ms.
The watch is fitted with a replacement black leather strap and a polished silver-tone Omega-style buckle.
Overall, this is an attractive vintage Omega Seamaster with a distinctive turquoise-green dial, an elegant stainless steel case, and an automatic mechanical movement.
The combination of classic proportions and the dial’s vibrant color makes this an interesting example within Omega’s vintage Seamaster collection.
Please review all photos carefully for a complete picture of the watch’s condition, details, and visible signs of age and use.
Details
Brand
Omega
Gender
Men
Model
Seamaster Day-Date
Band material
Leather
Reference number
166.0278
Band length
Long (over 200 mm)
Shipped insured
Yes
Repainted dial
Yes
Period
1970-1979
Movement
Automatic
Dial colour
Turquoise
Case material
Stainless steel
Original box included
No
Original papers included
No
Case diameter
34 mm
Original warranty included
No
Condition
Very good - minor signs of wear
