This is a 1950's yellow enamel Sterling Silver Siam pendant so marked. The chain is also sterling silver. The bail and pendant are 2" x 1". Chaim Length 16". The enamel is in very good condition. A nice period piece and a good alternative to the usual black enamel Siam pieces readily found. The back of the pendant is marged Sterling, Made in Siam, and AMFARCO, the maker.