12 minutes http://www.ebay.com/itm/VintageOMEG...373734?hash=item4b254d5ae6:g:uW8AAOSwmgJY6nTdPurchases made through these links may earn this site a commission from the eBay Partner Network
Omega archive says 1958/1960 with a 562 not a 503. The serial number also places this too early. Now that dial is sweet looking...
At 3300 you'd want the watch to be at least mostly original, hard to justify for a franken like that, though as mentioned dial is nice.