Ladies wrist Watch from 1940 in 10 & 12k Gold filled

This was a watch given to my mother from her parents, my grandparents back in 1940. It was a gift for graduation in 1940 and is ingraved on the back to her. The watch case is 10k gold filled and the band is 1/20 12k gold. In inscription on the band is 1/20 12k gf, pat.
196606.