This beautifully guilloche-enameled pin has much detail and actually has not only green and white, but black and brown used to create detail. The mark is that of Hror Prydz, perhaps Norway's most skilled enamelist-jeweler. The metal is gold over sterling; the pin is marked on the back. It measures 2" across by 1 1/8" high and weighs 9.4 grams. The fittings include a tube hinge and older-style safety catch, dating this beauty from mid-century. This butterfly is in excellent original condition.