Vintage gold filled heart locket on fine chain

About 3/4 inch in each direction, this little locket is daintily engraved with a heart and leaf design on the front. Marked on the inside 1/20 14K GF preceded by a what I think is a maker's mark, as well as 14K GF on the bail. I don't see any marking on the 17 inch chain. All in very good condition.