Vintage encircled leaves brooch pin cultured pearl 1950s era ll1954

This lovely pin is reminiscent of Krementz gold-filled jewelry and while it is definitely of that 1950s vintage, it has no maker's mark. It is marked on the heel of the clasp but I can't make it out. My guess is that it is 1/20 12K GF.

The brooch is lovely with 3 detailed and textured leaves in a double circle of gold, all anchored with a single prong-set cultured pearl. The pin has a bar and safety clasp on the back. Perfect condition. It measures 1� x 1� inches. Lovely classic piece that can be worn with leaf points up or down.