I'm not sure of the exact age of this ladies watch but it is very well made. The case is 45mm wide by 30mm long and has the French Hallmark for sterling in four different locations. The movement is an ETA 2512 and even the dial is sterling I believe.
It appears the maker A Barthelay went out of business. If anyone happens across one they were quite expensive in the 70's and are indeed well made for higher end designer watches. My girlfriend likes it and with the large size it's not way out of style for today.