hi - great site here. I have had my grandfathers vintage Omega for about 20 years. I had it cleaned when I first inherited it, and have worn it off and on over the years. It runs well, but I need to replace the crystal and have it serviced again. I would like some help identifying it to make sure It's worth the cost of repair. I don't know which of these numbers is the best way to identify it. The watch itself says "11312526 Seventeen 17 jewels unadjusted" The inside of the case back says "Wadsworth 14k gold filled F6212 T912414 S9973" I imagine some exper/s on this site will be able to give advice based on this, right? I appreciate the help in advance!