1930s Glass Cameo Shepherd's Hook Earrings

These elongated 8-sided portrait earrings feature two young women in profile, in the style of Italian cameos. While the earrings appear multi-layered, they are not: each consists of cream-colored pressed glass, with a brown-enameled layer to simulate the background of a genuine cameo. Small hammered metal plates with shepherd's hooks have been glued to the backs. There appears to be a tiny chip at the bottom of one of the earrings. These earrings, I believe, date from the 1930s. Each earring measures 1"high and 3/4" wide. Each shepherd's hook is 1" long.