Opinions on this Omega Ref.2576-4 "Pre-Seamaster"?

padders

First comment, it’s not what is normally known as a pre-Seamaster. That model and its 2577 brother were introduced in 1948 as the original Seamaster, the waterproof models that came immediately before in the mid '40s are therefore known as the pre-SM. The 2576/7 didn't have SM text on the dial until about a year after launch so late 1949. A few years after they got text on the rear too but these were plain. Your watch serial dates it at maybe late '48 early '49 by the way so it is early but not one of the very first which I think had serials around 11.3m or so AFAIK. The hour/min hands have deffo been replaced and likely have superluminova, otherwise it is a little tired but seemingly straight, the patina is quite noticeable but also quite pleasant. The small second looks OK to me. The movement looks very clean which is a good sign. I'd personally be happy to own that, but at the right money. What is the asking price?

padders

You are better off making your own thread as if you tack your question on to this older one it can get lost but my answer would be that if it is old enough, there may be no SM script on the dial, that would be the case for a 11.3-11.9m serial or thereabout ie from 1948-9. No not all 2576s of any iteration will look the same it seems. There are dozens of variations so it wouldn't bother me that you have found one that looks different. I am not sure what you mean by the colour variation question so it may be best for you to post a photo, as I say though, it may be best to start a whole new thread.

Cheers

hoipolloi

The rotors were replaced by non chronometer ones or they were like that on early movement?