Welcome to Watchuseek. You have a nice ladies' watch from the middle of last century. Without the inscription, I would have said 1950s but it seems to be from very slightly earlier than that. The movement is a Girard Perregaux calibre 89 but at that time, GP didn't make their own movements but redesignated generic movements. This one is by Adolf Schild, probably a Cal. 1012 (or derivative):
Ladies' watches like that are practically worthless over and above material value (and this one, being only gold filled, doesn't even have much material value). However, they work just as well as gents' watches and make nice heirlooms if someone is willing to wear them. In that case, it is worth having them serviced, otherwise parts tend to break (not enough lubrication once the oils have dried). If noone will currently wear it, you can save the servicing cash for the present.
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