My 0.02, you could take it to a watchmaker (not a mall kiosk) and ask them to open it so you can take some photos and write down the details of the movement and serial number and what is written on the case back. The watchmaker will want a relationship with you, because you will need to bring the watch back in 5 years or so for another service. Hang around here longer, and you will start buying more watches that will also need a service or some random parts! If the strap (which may be original?) starts to be insecure, be sure to have the watchmaker swap that Omega buckle onto a new strap (if buying a non-Omega strap). Great looking watch and nice to have those memories
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