Help me identity my latest 50's Vintage Omega Bumper Automatic

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Hi folks,

I purchased a 1950s Omega bumper automatic from a trusted dealer yesterday. He said that he didn't have a tonne of history on the watch, but had been part of his collection for 20 years, and so I'm looking to try identify the reference number (without having to take the back off). Spent hours looking for it and found a bunch of Omega's from the 50's that looked very similar in the 2xxx reference number range, which I `think` is the 1950's reference set 2,000,000-2,999,999 but they used the 4 and 5 digit method back then.

These are the things i know so far:

- 1950s Omega Bumper Automatic
- 14k Gold filled
- Claims to be on the rarer side given the date on it
- Strap is just a cheapy but will look to replace with something nicer

Photos included.
 
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IMO, this is a very early variant of the Ref. 2627, the first Seamaster Calendar watch. I think some of these may have come with US made gold-filled cases, rather than Swiss made ones.

Here are two ads for this watch:



Note that some of these did not say “Seamaster” on the dial. I also think that the crown was replaced at some point. Still a pretty nice example.
gatorcpa
 
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Thank you so much!

Also got it opened up and has the Ref 2170 which is interesting.
 
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IIRC, that's not an Omega reference number, it's a US-cased watch by L&K.
 
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Thanks Tony! Appreciate it. Any recommendations on what I can compare this to as point of reference for it's value?
 
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Thanks Tony! Appreciate it. Any recommendations on what I can compare this to as point of reference for its value?

Unfortunately, once the case gets to that condition, where the plating is gone from the lugs, the value is nominal, probably less than $200 IMO.
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