Vintage Elvik & Co Brooch Blue Guilloche Enamel Sterling Silver Norwegian PinA rich cerulean blue color makes up this vintage modernist guilloch enameled brooch by Elvik & Co. of Oslo, Norway, circa 1950s. The finely crafted ribbon bow style Norwegian pin, consists of sterling silver with gold vermeil and glazed in a vivid blue guilloche enameling with vitreous glass finish. It measures approximately 2&1 8 inches across, has a c catch, weighs 13. 5 grams, and is stamped 925 S, Sterling, Norway, along with the makers mark of