Vintage 14K or 12K yellow gold filled Victorian Cameo pendant

Vintage Victorian handmade gold filled pendant. With a real authentic lady's head Cameo, hand carved from natural Conch shell. Stamped G.F. and has a date year (I think it is British). Back in the day, the gold filling was most commonly done with 14 karat gold, and sometimes with 12 karat gold. About 1" long. Some wear on the back, the front is still in excellent condition, as pictured. Gold filled vintage jewelry is considered valuable and collectible as it tends to be of better quality and also contains quite a bit of real gold.