Omega Seamaster Ref. 2907 Calibre 321 Chronograph

omega3man · 2008-10-16T07:13:22Z

Explore the rare 1958 Omega Seamaster Ref. 2907 Calibre 321 chronograph. Expert insights on originality, bezel replacement, and market value for this vintage Omega.

omega3man

WPS member · Omega forum

3 replies7561 views5 photos

omega3man's inquiry into a 1958 Omega Seamaster Ref. 2907 with a Calibre 321 chronograph highlights the enduring challenges and specific details collectors face when evaluating vintage timepieces. His questions about bezel replacement, rarity, and valuation underscore the critical importance of originality and expert authentication in the vintage watch market. This thread offers valuable insights for anyone considering acquiring a rare vintage Omega chronograph.

Hello, I am interested in a 1958 first-generation Seamaster three-register chronograph Ref 2907 with calibre 321 movement, alpha hands and the beefy lugs of the early Omega Seamasters. There’s one for sale at the moment on that unmentionable auction site and it looks the same as the one worn and posted some time ago by Bill Sohne. It is all original but lacks the bezel ring on the top of the case. The seller says Omega quoted him 400 to 600 Swiss francs to replace the ring in 1998. My questions are: How difficult and expensive will it be for me to have the ring replaced or remade today? How rare is this model – I have seen very few surface – and what value would you put on it if it was all original in excellent working condition? Thanks for any information you can provide.

First generation 1958 Seamaster Chrono Ref 2907

Calibre 321 in Ref 2907

Missing 14K gold bezel ring on Ref 2907

Another view of missing bezel ring on Ref 2907

Crown side view of ref 2907

Key Points from the Discussion

The Ref. 2907 is identified as the first Seamaster chronograph reference, with 'CK' denoting steel and 'CO' indicating a gold shell case with a 14k solid gold bezel.
The original poster's specific example, a CO 2907, is missing its 14k solid gold bezel, and the dial appears to be repainted, with the sweep second hand and 12-hour register hand likely replaced.
The Ref. 2907 is considered an uncommon Seamaster reference, not appearing frequently on the market, making original examples difficult to find.
Original Ref. 2907 watches should have a signed Omega crown, and dial authenticity can be questioned if details like the 'Seamaster' text appear 'odd'.
The original poster seeks clarification on whether Omega had different hand configurations for early Seamaster chronographs, specifically regarding alpha hands on all registers.

The Discussion

Bill Sohne

Oct 16, 2008

Hi omega3man The 2907 is the first Seamaster chronograph reference.. My example is in steel hence it is a CK 2907.. The example your looking at is CO 2907 gold shell with a 14k sold gold bezel (missing on your example). The dial appears to be repainted, the sweep second hand and the 12 hour register hand looks to be replaced. The 2907 is an uncommon Seamaster reference. I do not see them come up all that often . You know I cant even remember how and where I bought my CK 2907.. But I do remember

omega3man

Oct 17, 2008

Hello Mr. Sohne, I appreciate the advice and next time I'll pm you when I have such a question. An owner of another early Seamaster with Cal 321, this one all in stainless, posted this picture of his watch. Do you know the reference for this model? It looks like the constant seconds hand is a replacement, assuming all register hands originally had alpha hands, as in the case of your watch. Or did Omega have different hand configurations? I am also curious whether the original ref 2907 would have

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Omega Seamaster Ref. 2907 Calibre 321 Chronograph

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