This finely wrought sterling silver fish pin is inlaid with peach, black, yellow, and lavender guilloche enamel. The design is modern, which, along with the mark, dates it from the 1950's. The mark is that of Castelan. There is the eagle registry mark with #15. The pin is 1 1/2" long and 1 3/8" high. It is in perfect original condition.