Today's offering showcases this very cool vintage Omega mens ref. 135.011 watch. This reference is interesting in that it was sometimes branded as a Seamaster 600, as a Geneve, and double signed as a Seamaster 600 Geneve. Most were sold under the Seamaster 600 moniker - Geneve examples are seen less often, and the rarest are the double signed versions.

This is a Geneve branded example, and it is identical in general construction to the Seamaster 600 signed version except for the dial signature and the lack of the Seamaster engraved or embossed into the case back. (We have included a photo in the listing of a double signed Seamaster 600/Geneve model).

Interestingly the back looks like a Seamaster back with the engraved Seamonster except rather than having Seamaster wording it simply says waterproof.

The 600 series was named because of the movement that powers the watch. Besides being hand-wound, a less common trait for a Seamaster, the Seamaster 600 also features a slightly thinner case than automatic Seamasters.

It measures approx. 34.5mm in diameter without the crown, about a millimeter and a half smaller than a Rolex Datejust.

The watch is 100% original down to the dial, hands, winding crown and even the signed crystal. It is in pleasing original condition. The original and untouched dial is better than near mint. The case is in better than excellent condition with light signs of polishing.

The caliber 601 movement has just been serviced. It is quite pristine and running very true. For the finishing touch we have installed a new high quality crocodile strap.

Included with the purchase is a one-year warranty on the movement and its function, a custom printed Connoisseur of Time Certificate of Authenticity, and a new timing certificate attesting to the watch's performance.

• Manufacturer: Omega
• Country of origin: Switzerland
• Serial no.: 28,321,059
• Year built: c. 1969
• Model: Ref. 135.011
• Functions: Hours, Minutes, Sweep Seconds
• Designed for: Men
• Dimensions: 34.5mm diameter (excluding crown) by 40mm long lug tip to tip
• Case material: Stainless steel
• Case markings (outside): Waterproof
• Case condition: Excellent condition with a few spots of wear and light signs of polishing.
• Dial: Silver, signed Omega, steel indices, outer second/minute track, original. There is a small circle (only visible when the watch is held at certain angles) around the center post from the hour hand rubbing. Without that the dial would be mint.
• Hands: Original, steel, 'batons'
• Movement type: Caliber 601, signed Omega, manually wound, copper colored, 17 jewels, straight-line lever escapement, monometallic balance, shock absorber, self-compensating flat balance spring
• Movement markings: Omega Swiss, Seventeen Jewels, Adjusted to Two Pos.
• Jewels: 17 rubies
• Band: Crocodile, fully stitched, padded, brand new and unworn
• Crystal type: Acrylic, original, signed Omega, excellent condition
• Serviced: Yes, freshly serviced.
• Timing: Timed to precision on a state-of-the-art computerized system. Your watch is important to us, and we will take care of it for its lifetime. We provide the best after sale care in the business with an experienced team of watchmakers both of whom each have over forty years of experience and a large number of parts.
• Warranty: 1-year warranty. Please email concierge@cotwatches.com for details.
• Box/Papers: BOX - Connoisseur of Time watch presentation box; PAPERS - Custom printed Connoisseur of Time Certificate of Authenticity; New timing certificate
• Returns: 7 days full refund. 100% satisfaction guarantee

We offer a 100% satisfaction guarantee for all of our watches. If you are in any way unsatisfied with the watch we will fully refund the purchase price anytime within 7 days after the watch has been received. Our goal is to exceed our client's expectations throughout the buying experience.

All watches are packaged carefully and mailed double boxed in specially constructed, reinforced shipping boxes designed for high value items. All watches are sent fully insured with signature required. Most of our domestic shipping is done through FedEx. At times we will also use USPS Express Mail, and we can accommodate most requests for your preferred carrier. International shipments are sent USPS International Express Mail or FedEx.

The purchase price will be the declared value of the merchandise on any required customs forms. The payment of all customs duties, tariffs, and taxes are the responsibility of the buyer.

Also note that water resistance of vintage watches can no longer be guaranteed and is not covered under the watch's warranty. We do not recommend getting a vintage watch wet, even one that was originally designed to be waterproof.

To get an idea of how this watch will look on the wrist, please use the Watch Sizing Guide