Locket Brooch Vintage 1950s Pink Enamel Rose on Blue

This is a charming vintage locket brooch dating from the 1950's. The pin is shaped like a bow in gold tone metal, with a a safety clip. The locket is round, with a border of tiny rhondelles. It features a pale blue guilloche enamel background, and is centered with a pink enamelled rose. The reverse has a glass covered compartment which can be opened with a fingernail or the blade of a thin knife. There is no hinge. It stays in place securely. This measures 1" wide and 1 5/8" long with the pin. The condition is very good. There are a few scratches on the back of the bow. There is a brown speck on the enamel in the pictures which was just a bit of dust, it wiped off and there is no mark now!