You are viewing a large Swiss open face pocket watch made around 1890. The case measures 64 mm or around 2 1/2" in diameter. The porcelain dial reads: Perrin, Geneve. The case is hallmarked on both back covers with an 800 hallmark. The movement is 15 jewels. The watch is stem wound and pin set at 1. It has an acrylic crystal. The watch winds, sets, runs and keeps time.