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Omega Seamaster Cosmic - Model Ref: 135017 - Unishell - Tool 107 - c.1969

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A Rare Omega Seamster Cosmic in Fantastic Condition with a (Front Opening) Unishell Case and Beautiful Silver Crosshair Dial

The Omega Seamaster Cosmic is an iconic timepiece that has captured the hearts of watch enthusiasts around the world. First introduced in 1966, this elegant and versatile watch quickly gained popularity for its impeccable craftsmanship and timeless design.

What’s On Offer

This Omega Seamster Cosmic with its Unishell (case opening on dial side) case is in absolutely superb preowned condition. It boasts a fantastic silver crosshair dial with quarter-applied polished steel baton markers with onyx inserts. The Seamaster and Omega signatures are the only addition to the dial as well as the outer minute and seconds track. The dial is encased in a fat tonneau-shaped stainless steel case which unusually opens on the dial side and displays the Hippocampus on the case back which has been synonymous with the Seamaster line and present since 1957. The caseback also has tool 107 engraved, the original tool used to open the watch. This reference was only produced for a short time and therefore is dwindling in numbers, especially in this condition - they are actually rather rare. This watch would be a fantastic addition to any collection and will see the wearer through all manner of occasions, from everyday wear to more formal situations. It is running well and keeping good time, snap it up! 

Additional information

Made from

Case: Stainless Steel

Dial: Silver


Bracelet: Leather Pin Buckle

Technical specifications

Winding: Manual

Movement Type: Mechanical

Calibre: 601

Jewels: 17


Power reserve: 48hrs

Purchase details

Condition: Excellent

Model Reference: 135017

Date of issue: c.1969 

Warranty: 12 Months by VWS


Width (without crown): 35mm

Lug width: 19mm

Lug height: (lug to lug) 38mm

Wrist size: Adjustable