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You don’t mention the asking price. These are generally available on the second hand marketplace and not expensive so you might wander to shop around and have a look at what’s available on eBay and Chrono24 for buying or comparing.
But well done for checking it out on this Forum before buying …. and good luck with your wedding
It's not a great example for a collector, and we can pick apart the problems associated with condition and originality, but if $500 is your budget, you're honestly not going to do much better for a vintage Omega. It will look good on the wrist, and should be fine to wear for your wedding as long as it is running.
If you want something good, and you don't have time to learn about watches, then I'd suggest increasing your budget by 3x or 4x to buy something quickly from a dealer.
If at some point you find that you are really interested in vintage watches enough to become an enthusiast, then come back and we can help you find something that a collector would appreciate. But it will take patience and a larger budget, and with the wedding coming up, it might not be your highest priority, which is totally understandable.
The dial photo isn't clear enough to tell if it is any good (though I don't see anything obvious), but the movement looks a touch rough? Someone has been in there and wasn't particularly clean with their service/last time there.
Also, the lugs seem very worn. Note they aren't solid gold, so they are going to start showing 'steel' color through them soon. You can see it near the bottom lugs, where it is starting to come up 'around' the bottom.
Also, I don't know the ref, but I suspect this should have had a gold colored crown, and I don't know if I've seen a partially-gold-filled/capped/whatever case, that left the main body steel. I could be wrong on that one (and knowing hte actual reference would help!), but that seems suspcious to me.
IMO, you can do better.
I did some research and i found a similar reference KO 2636-6. Which shows production from the 40s-50s. Can’t find the exact match on this one though