Seiko - LM "Gradient Green Sunburst" 理光 (Rikō) – Logical Light - No reserve price - 5606-7310 - Men - 1975
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Seiko LM "Gradient Green Sunburst" 5606-7310, a 37 mm stainless steel automatic Lord Matic from 1975, with gradient green sunburst dial, gold-tone indices and a day-date at 3 o'clock, featuring a rare facet-cut crystal and a period-correct steel bracelet for wrists up to about 17 cm, in very good condition with minor wear.
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Description from the seller
Offered in this auction by Second Vintage
A rare opportunity to acquire a Seiko LM "Gradient Green Sunburst" featuring the highly sought-after facet-cut crystal, a true collector’s piece that is increasingly difficult to find in this condition. This vintage Seiko perfectly showcases 1970s Japanese watch design, with a striking sunburst dial, sharp case lines, and a period-correct bracelet—ideal for enthusiasts and collectors pursuing distinctive style and historical significance.
Brand: Seiko
Model: LM "Gradient Green Sunburst"
Reference Number: 5606-7310
Serial Number: 526489
Movement: Automatic (27s to 35s/day on timegrapher)
Dial: Gradient green sunburst with gold-tone markers, day-date at 3 o’clock
Case Size: 37 mm (excluding the crown)
Case Material: Stainless steel
Production Year: 1975
Condition: Excellent, original vintage condition with light, honest wear; running within vintage tolerances, with timegrapher results of +27 to +35 seconds per day, indicating healthy movement performance.
Dial and Hands
The original gradient green sunburst dial is the true highlight of this watch, presenting a beautiful shift from emerald to olive tones depending on the light. Gold-tone applied indices and dauphine hands add warmth and elevate the sophisticated 1970s aesthetic. The lume on hands and indices has gracefully aged to a subtle patina, amplifying the watch’s vintage charm. The crisp day-date display at three o’clock completes this elegant and functional layout.
Case and Crystal
The 37 mm stainless steel case retains its defined lines and factory brushing, showing only minor signs of gentle wear. The rare facet-cut crystal is a standout feature, its angular edges scattering light and enhancing the dial’s brilliance. The case maintains a robust and attractive profile, with no major dings or scratches visible.
Movement
Fitted with Seiko’s reliable automatic movement, this Lord Matic model is performing well within vintage tolerances. Timegrapher readings show a daily rate of +27 to +35 seconds, confirming the movement’s healthy operation. The quickset day-date mechanism functions cleanly, delivering both reliability and convenience.
Strap
The original-style multi-link stainless steel bracelet fits wrists up to approximately 17cm. The bracelet is comfortable, secure, and perfectly complements the watch’s angular case architecture.
Condition
This Seiko LM remains in excellent vintage condition. The gradient green dial is vibrant and original. Case lines and brushing are well-preserved and crisp. The facet-cut crystal is clear with only minor age-appropriate marks. The bracelet and case show light wear consistent with careful use. The watch is running within vintage tolerances, supported by strong timegrapher performance data.
Dimensions
Case diameter: 37 mm (excluding the crown)
Fits wrist size: up to 17 cm
Remarks
Facet-cut crystal Seiko LMs with gradient dials have become highly collectible, and examples in such original condition are increasingly rare. This piece stands out for its vibrant dial, strong case geometry, and sought-after crystal—an ideal addition for any vintage Seiko enthusiast or watch collector.
History
The Seiko LM (Lord Matic) collection exemplifies the brand’s innovation in design and reliable automatic movements from the late 1960s and 1970s. The gradient green sunburst dial and distinctive facet-cut crystal make this a true classic of Seiko’s golden era, offering a unique opportunity to own a piece of Japanese watchmaking history.
Payment and Shipping
Payment must be completed within 1-3 days after purchase.
The watch will be securely packaged and shipped with tracking and insurance for your peace of mind.
Please review the pictures carefully before bidding. We strive to showcase the watch from multiple angles for an accurate representation.
As with all vintage watches, water resistance is not guaranteed.
The watch will be delivered in fully functional working condition.
If you have any questions, feel free to contact us after the auction ends.
/ Second Vintage
SKU: SEIFSVR650000
Seller's Story
Welcome to Second Vintage. Our weekly selections feature carefully curated vintage timepieces from iconic brands such as Rolex, Omega, Longines, Seiko, and many more. Each watch is thoroughly inspected and always delivered in working condition. We are a team of dedicated vintage watch enthusiasts with deep expertise in the details that truly matter – from reference numbers and movements to authenticity, design, and historical nuance.
With thousands of successful auctions and satisfied customers across the globe, we are proud to be recognized as a Top Seller on Catawiki. Our reputation is built on trust, transparency, and consistent quality. You can bid with confidence knowing that your satisfaction is our highest priority.
We ship quickly and securely, using professional packaging to ensure your watch arrives safely and exactly as described. All items are dispatched within 2–3 business days after payment. In the rare event that something occurs during transport, vintage watches can occasionally be affected by handling. Should an issue arise, we respond promptly and are always ready to assist in finding a solution. Your satisfaction comes first. Learn more about our brand at SecondVintage com
Offered in this auction by Second Vintage
A rare opportunity to acquire a Seiko LM "Gradient Green Sunburst" featuring the highly sought-after facet-cut crystal, a true collector’s piece that is increasingly difficult to find in this condition. This vintage Seiko perfectly showcases 1970s Japanese watch design, with a striking sunburst dial, sharp case lines, and a period-correct bracelet—ideal for enthusiasts and collectors pursuing distinctive style and historical significance.
Brand: Seiko
Model: LM "Gradient Green Sunburst"
Reference Number: 5606-7310
Serial Number: 526489
Movement: Automatic (27s to 35s/day on timegrapher)
Dial: Gradient green sunburst with gold-tone markers, day-date at 3 o’clock
Case Size: 37 mm (excluding the crown)
Case Material: Stainless steel
Production Year: 1975
Condition: Excellent, original vintage condition with light, honest wear; running within vintage tolerances, with timegrapher results of +27 to +35 seconds per day, indicating healthy movement performance.
Dial and Hands
The original gradient green sunburst dial is the true highlight of this watch, presenting a beautiful shift from emerald to olive tones depending on the light. Gold-tone applied indices and dauphine hands add warmth and elevate the sophisticated 1970s aesthetic. The lume on hands and indices has gracefully aged to a subtle patina, amplifying the watch’s vintage charm. The crisp day-date display at three o’clock completes this elegant and functional layout.
Case and Crystal
The 37 mm stainless steel case retains its defined lines and factory brushing, showing only minor signs of gentle wear. The rare facet-cut crystal is a standout feature, its angular edges scattering light and enhancing the dial’s brilliance. The case maintains a robust and attractive profile, with no major dings or scratches visible.
Movement
Fitted with Seiko’s reliable automatic movement, this Lord Matic model is performing well within vintage tolerances. Timegrapher readings show a daily rate of +27 to +35 seconds, confirming the movement’s healthy operation. The quickset day-date mechanism functions cleanly, delivering both reliability and convenience.
Strap
The original-style multi-link stainless steel bracelet fits wrists up to approximately 17cm. The bracelet is comfortable, secure, and perfectly complements the watch’s angular case architecture.
Condition
This Seiko LM remains in excellent vintage condition. The gradient green dial is vibrant and original. Case lines and brushing are well-preserved and crisp. The facet-cut crystal is clear with only minor age-appropriate marks. The bracelet and case show light wear consistent with careful use. The watch is running within vintage tolerances, supported by strong timegrapher performance data.
Dimensions
Case diameter: 37 mm (excluding the crown)
Fits wrist size: up to 17 cm
Remarks
Facet-cut crystal Seiko LMs with gradient dials have become highly collectible, and examples in such original condition are increasingly rare. This piece stands out for its vibrant dial, strong case geometry, and sought-after crystal—an ideal addition for any vintage Seiko enthusiast or watch collector.
History
The Seiko LM (Lord Matic) collection exemplifies the brand’s innovation in design and reliable automatic movements from the late 1960s and 1970s. The gradient green sunburst dial and distinctive facet-cut crystal make this a true classic of Seiko’s golden era, offering a unique opportunity to own a piece of Japanese watchmaking history.
Payment and Shipping
Payment must be completed within 1-3 days after purchase.
The watch will be securely packaged and shipped with tracking and insurance for your peace of mind.
Please review the pictures carefully before bidding. We strive to showcase the watch from multiple angles for an accurate representation.
As with all vintage watches, water resistance is not guaranteed.
The watch will be delivered in fully functional working condition.
If you have any questions, feel free to contact us after the auction ends.
/ Second Vintage
SKU: SEIFSVR650000
Seller's Story
Welcome to Second Vintage. Our weekly selections feature carefully curated vintage timepieces from iconic brands such as Rolex, Omega, Longines, Seiko, and many more. Each watch is thoroughly inspected and always delivered in working condition. We are a team of dedicated vintage watch enthusiasts with deep expertise in the details that truly matter – from reference numbers and movements to authenticity, design, and historical nuance.
With thousands of successful auctions and satisfied customers across the globe, we are proud to be recognized as a Top Seller on Catawiki. Our reputation is built on trust, transparency, and consistent quality. You can bid with confidence knowing that your satisfaction is our highest priority.
We ship quickly and securely, using professional packaging to ensure your watch arrives safely and exactly as described. All items are dispatched within 2–3 business days after payment. In the rare event that something occurs during transport, vintage watches can occasionally be affected by handling. Should an issue arise, we respond promptly and are always ready to assist in finding a solution. Your satisfaction comes first. Learn more about our brand at SecondVintage com
Details
Brand
Seiko
Gender
Men
Model
LM "Gradient Green Sunburst" 理光 (Rikō) – Logical Light
Reference Number
5606-7310
Band material
Steel
Shipped Insured
Yes
Period
1970-1979
Repainted dial
No
Movement
Automatic
Case material
Stainless steel
Original box included
No
Original papers included
No
Case diameter
37 mm
Original warranty included
No
Condition
Very good - minor signs of wear
Year
1975
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