Sterling Engraved Butterfly Stickpin Vintage Stick Pin

Sweet vintage stickpin features a raised and engraved butterfly or other insect on a diamond shaped head with engraved floral background. Its unmarked and hollow but looks and feels like sterling silver. Measures 3/4" x 3/8" head on a 2 7/8" pin and weighs 1 gram on my scale. Condition is beautiful with some moderate to heavy tarnish.