1966 OMEGA SPEEDMASTER main image


Model: 105.012-66
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This watch is managed by Watch Collecting. Learn more

Product overview

  • Box:No
  • Papers:No
  • Age:1966
  • Movement:manual
  • Case Size:42mm
  • Case:Stainless Steel
  • Dial:Black Baton
  • Bracelet:Stainless Steel

Lot overview

  • LOT: #005259
  • Location:London, United Kingdom
  • Seller:
  • Currency:GBP

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  • ​Among the most collectable Speedmasters, the ref. 105.012 was the first with the ‘Professional’ moniker on the dial and houses the venerable calibre 321 movement
  • Offered by a private seller based in the UK
  • ​Rated B for condition by the vendor who notes that the watch was serviced in January 2023 by an Omega Authorised Service Centre with documentation and a valuation certificate supplied
  • Lot includes an Omega-branded carry pouch
  • The accompanying document states movement serial number: 24956600, Calibre 321
  • Paired with the correct Omega signed 1039 bracelet with 516 end links but with early service-replacement bezel
  • The hand-set is from a MK II Speedmaster with distinctive blackened centres and appears to also have been an early service replacement


  • Hours, minutes, running seconds, 12-hour chronograph
  • Powered by the calibre 321 movement
  • ​Manual winding 

This watch is being managed by Watch Collecting for the duration of the auction and is being held in a secure third-party facility. Watch Collecting will release the watch to the successful bidder after the vendor confirms they have received payment.


The ref. 105.012 was launched in 1964 and represents an important chapter in the Speedmaster’shistory. It was the first time the ‘Professional’ moniker was printed on the dial and Omega upgraded the case to 42mm alongside the introduction of twisted lugs and crown guards. These enduring design traits would go on to define the modern Speedmaster. Internally, the watch carries an equally impressive amount of horological weight, housing the legendary calibre 321 which is widely regarded as one of the greatest serially produced chronographs ever made. Approved by NASA for space flight, this reference was also worn by early astronauts.  

All watches offered for sale are searched and cleared against The Watch Register database and a certificate is available to the winning bidder upon request.

Any watch not covered by a current sales or service warranty should be considered as potentially requiring a service, even if in full working order on the date of purchase.

The description of this auction lot is, to the best of the seller's knowledge, accurate and not misleading. Watch Collecting requests a range of detail about the lot from the seller, and performs a level of due diligence. However, bidders must satisfy themselves as to the accuracy of the description, and conduct any research they feel is necessary before committing to a bid. Please see our Terms and Conditions for full details.

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