Antique rose gold Cameo brooch painted lady Victorian portrait

Antique rose gold brooch ( untested metal) Gold filled or gold has not been defined. Selling as is brooch. Will need some TLC. Back of the brooch was unfinished or piece covering the back has fallenoff. It is unk. The trim on one side has to be repairs as well. The metal does appear to be GF rose gold. Appx 1920s-1930s. 1.5” tall 1.5” wide J7