Hello Everyone. I'm new here asking for information on this watch which was given to me, in particular its age. I know next to nothing about watches! It is a Waltham Model 645 screw-on back open face. Inside the back cover it says GUARANTEED 25 YEARS and has the number 0188160. 21 jewels, 5 positions. Adjusted. I couldn't find a picture of one with this exact design. I took it to a jeweler for a quick review, but they couldn't give me an exact year of manufacture. Apparently the mechanism inside was spinning, it apparently has balance problems and needs repair, especially since the inside works are not communicating with the face. It has a lot of jeweler markings inside, and the jeweler said the original glass was replaced with plastic. It is a beautiful design, but I would really like to know the age. Any thoughts?
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