Q: I have a 1950s 18K gold Omega watch with a cracked acrylic crystal. I see a few authentic Omega replacement crystals in the same size for sale online, and several different tools, I'm just wondering which tool is the best (but not too expensive) and if there are any "tricks" to doing it. I am pretty handy with the basics of clock repair etc., so don't bother answering if you are a watch repair shop employee and just going to tell me take it to a professional. For that same cost I can buy the part & tools and have the tools left over for future use.

A: Most of the older watches are opened from the back side with a tool that has "fingers" that fit into the square cutouts on the watch back. Once the back has been unscrewed or popped out, the workings can be removed to access the crystal. Keeping it water proof should be the only concern. Good luck.

Q: It has diamonds at 12 3 6 and 9 on the face. It is from sometime around 1979.

A: Take it to a reputable jewelry store and have them assess the watches value.