Hi, just having a research Saturday, I was looking images of reference 2576, and found this auction, it is a 2576 with gold caped case, but steel lugs, I wonder if it is a common case or it is special one, I tried to find more like that one, but no success. What do you think? Also I found several images of 2576 with holes side to side on the lugs and some with no passing holes, also some of them with chamfers on lugs and some that does not, and some have rounded lugs look at the link it shows not so round lugs(https://www.austinkaye.co.uk/vintage-omega-pre-seamaster-gold-capped-automatic-watch-rare.) According to what I saw the most common case is the one with rounded lugs and passing holes stainless steel case, but there were variants in lugs and finish, and there I was not able to find more info.
https://auction.catawiki.com/kavels...ent=207504&utm_medium=affiliate&utm_source=pn
On this link another example of not passing holes on lugs and not rounded same reference 2576. https://www.timeline.watch/watch/1952-omega-seamaster-automatic-ref-ko-2576/

 

You should post this in the Vintage Watch section instead of the "Forum news & Member Support." Perhaps one of the mods could help you move it.

 

Thanks a lot I already pass it to Vintage Section, I hope someone can help with my question, maybe it is to obvious for expert guys, but Im just researching and starting to learn about this beautiful watches.