Help identifying vintage Omega

JimInOz

Very nice Omega Seamaster Calendar from the mid-1950s.
You are right about the crown and bracelet, both are after-market.
As this is a solid gold case, the bracelet should be removed. The steel end pieces can chew away at the softer gold of the lugs.
I think it'd look nice on a plain brown or black leather strap, which would be what it originally came with from Omega.

If you tell us your location then somebody may be able to recommend a suitable watchmaker to service the movement.
No further restoration should be attempted.

JimInOz

Duplicate thread, reported for removal by Moderators.

seekingseaquest

It’s a solid gold 2757 reference from ~1953.

I believe this crown should work for you, assuming you’re okay with a used crown that will not be remotely waterproof. This one is an original from the ‘50s, but newer replacement crowns are available as well.

https://www.ebay.com/itm/204841096213

SOG53

Nice watch great family heirloom. If you want it to be water resistant (maybe proof) and wearable by your dad- your best bet is to take it to an independent Omega-certified watchmaker- and they will service it and replace the gaskets and crystal and install a service crown with proper seals- and you will have a wearable watch. They will do a pressure test to make sure its water resistant- it wont be for swimming but good for everyday wear. Dont have it polished dont replace hands. Dont have them touch the dial. Dont send to Omega it will be prohibitively expensive and they will replace too much and destroy the vintage appeal.
If you share your location someone will have a recommendation for a watchmaker. A nice black or dark brown leather strap will be a great addition.
Please share the result after service!