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Erwin Dekker

Omega Seamaster Cosmic Automatic – Ref. 166.026 | Cal. 565:

⸻

A standout in Omega’s late 1960s lineup, the Seamaster Cosmic Ref. 166.026 features a sleek monocoque (front-loading) case paired with the highly respected Caliber 565 automatic movement. Known for its robust design and superior finish, the Cosmic model blends durability and refinement, ideal for everyday vintage wear. The clean silver dial with applied indices, central seconds, and quickset date function makes this piece both practical and collectible. Its distinctive tonneau case and elegant proportions make it a must-have for fans of retro Omega engineering.

Important Note: High-resolution photos may exaggerate imperfections not easily visible in person. Please review all images carefully.

Brand: Omega

Model: Seamaster Cosmic – Ref. 166.026

Movement: Omega Caliber 565 – automatic with quickset date

Case: Stainless steel, monocoque (front-loading) construction

Case Dimensions: Approx. 35mm diameter (excluding crown)

Dial: Original silver dial with applied indices and framed date window

Crystal: Acrylic

Crown: Original Omega signed crown

Bracelet: Blue leather strap

Buckle: Omega Buckle

Functions: Hours, minutes, central seconds, date

Condition: Very good vintage condition. Movement runs well and all functions operate correctly.

Tax Disclaimer: Buyer is responsible for any applicable taxes, customs, or VAT.

Shipping: Worldwide shipping via insured and tracked courier.

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Automatic - Stainless steel

Omega - No Reserve Price - Seamaster Cosmic Automatic Cal.565 - 166.026 - Men - 1969

Watches

Reserve price

No reserve price

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Closing date

Monday

31 January

Tuesday

30 January

Wednesday

Thursday

1 February

tomorrow

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Location

Italy

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Case diameter

35 mm

36 mm

34 mm

37 mm

38 mm

33 mm

40 mm

32 mm

30 mm

31 mm

39 mm

42 mm

28 mm

Less than 20 mm

41 mm

43 mm

20 mm

25 mm

26 mm

23 mm

29 mm

46 mm

44 mm

Greater than 50 mm

22 mm

Watch band length

Regular (180–200 mm)

Long (over 200 mm)

Short (160–180 mm)

Very short (under 160 mm)

Object

Watch

Mechanical watch

Chronograph watch

Digital watch

Bracelet

Material

Stainless steel

Gold-plated

Steel

Chromed

Yellow gold

Gold

Metal

White gold

Gold-filled

Pink gold

Gold/Steel

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Gunmetal

Argentan

Gender

Unisex

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Condition

Very good - minor signs of wear

Good - visible signs of wear

Fair - major signs of wear

Unworn - no signs of wear

Good condition - used with some signs of wear

Period

1970-1979

1960-1969

1950-1959

1900-1949

1980-1989

1990-1999

2010-2020

2000-2010

Stone

Diamond

Certification

No laboratory report

Style

Art Deco

Colour

Black

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White

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Blue

Brown

Salmon

Green

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Mother of pearl

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Watch movement

Manual winding

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Other

Old European cut

1900-2000

Diamond type

Natural

Watch band material

Leather

Textile

Gold/steel

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Model

Unknown

Vintage

Calatrava

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Tank

Seastar

Classic Chronograph

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Omega - No Reserve Price - Seamaster Cosmic Automatic Cal.565 - 166.026 - Men - 1969

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