Wingback Brooch Pin from 1940's W/ Czechoslovakian Stones Pat. No

Wingback was a trademark used by the Wingback Company of NYC, circa 1940's. He also mentions that this jewelry is rare and identifiable by its "Wingback" fastener and the name stamped on the wire. 31 Czechoslovakian stones.

Wingback stamp with Pat.No.

Trying to find the value.

Thank you