Now available at auction from Second Vintage
A stunning opportunity to acquire the Omega Seamaster Cosmic Date, reference 166.045. This classic timepiece, manufactured in 1970, is a showcase of Omega’s distinctive 1970s design and robust engineering. Featuring the highly regarded caliber 565 automatic movement, this example combines era-defining style with reliable mechanics. The original silver sunburst dial, elegantly integrated date window, and impressive monocoque stainless steel case construction embody the Seamaster Cosmic’s reputation for refined yet bold wrist presence.
Brand: Omega
Model: Seamaster Cosmic Date
Reference Number: 166.045
Serial Number: 30293840
Movement: Omega Caliber 565 Automatic
Dial: Silver sunburst, applied indices, date window at 3 o’clock
Case Size: 35 mm (excluding the crown)
Case Material: Stainless steel
Production Year: 1970
Condition: Excellent vintage condition, with crisp dial and hands; timegrapher: -5 to -8 seconds/day with strong amplitude, indicating healthy movement and reliable performance.
Dial and Hands
The original silver sunburst dial stands out with its well-preserved brushed finish, sharp Omega branding, and precisely applied indices. The baton hands remain clean and true to the period, showing gentle and even patina on the Tritium lume, enhancing the vintage appeal. The date aperture at 3 o’clock is well-defined and seamlessly integrates into the overall design.
Case and Crystal
The stainless steel monocoque case measures 35mm across, exemplifying Omega’s innovative one-piece construction. The case retains sharp, defined edges and the distinctive cushion shape, with original brushed and polished surfaces evident. Light, honest signs of wear add to its character, while the acrylic crystal is clear and well-preserved, maintaining excellent visibility.
Movement
At its heart is the renowned Omega Caliber 565 automatic movement, famed for its reliability and smooth operation. Timegrapher results show a rate of -5 to -8 seconds per day with strong amplitude, a testament to the health and quality of this example, providing confidence to the discerning collector or daily wearer.
Strap
The watch is paired with a supple black leather strap and stainless steel pin buckle, offering a versatile and comfortable fit that complements both the watch’s aesthetics and era.
Condition
This Seamaster Cosmic Date is presented in excellent vintage condition. The dial and hands are clean and well-preserved, with attractive patina. The case maintains sharp lines and its original finishing, with only light wear visible. Movement performance is strong, ensuring both collectability and practical use.
Dimensions
Case diameter: 35 mm (excluding crown)
Remarks
Offered running within excellent vintage tolerances with impressive amplitude, this Seamaster Cosmic Date is an outstanding and original example. The preservation of the dial, hands, and case sets it apart as a truly desirable vintage Omega.
History
Launched during Omega’s period of innovation in the late 1960s and early 1970s, the Seamaster Cosmic was notable for its advanced monocoque case and modern styling. The reference 166.045 epitomizes the era, showcasing Omega’s dedication to both design excellence and technical achievement. Powered by the respected caliber 565, this model remains a sought-after piece for collectors seeking authenticity, reliability, and the unmatched charm of vintage Omega.
/ Second Vintage
SKU: OMEM67ZGJ0000





































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Omega Seamaster Cosmic Date 166.045 (1970)
Omega • 1970
Sold for
€625
≈ $699
Sold on Dec 28, 2025
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