Vintage 1960's Mid-century Jade pendant

Vintage 1960's Mid-century etched jade pendant. Encased in a gold bamboo style frame. Hallmark on back of pendant states 12KGF. It is not gold plated; it's gold filled. The chain is approximately 22" & the pendant is 1 1/2" long. In perfect vintage condition. I also added a closeup picture of the chain. It's very strong & has a unique twisted style. *OFFERS WELCOME*