Hello,
The dial was repainted and is completely wrong (wrong logo, wrong font, wrong indexes etc...) for this watch. The hands are also incorrect.
The early Omega calibers were marked on the dial side of the mainplate. Yours seems original to me. If you remove the dial (or have it removed by a watchmaker if you're not familiar on how to do) you shoud see the Omega serial number and a reference to patent 8760). Don' worry if the caliber and case serials don't match, they never do as Cases and calibers were numbered separately were produced and assembled later.
Unless you are lucky enough to find a correct set of dial and hands and the replacement parts for a small price, I think it is not worth the costs of bringing this watch back to a collection condition.
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