You are viewing a very fine Swiss made open face pocket watch by Tavannes around 1910. The case has a 1 3/4" diameter or around a size 14. The case is made with Mother-of-Pearl. The dial is porcelain and has the remnants of the watch company name. Around the dial on the outer border is Mother-of-Pearl. The movement is marked: Tavannes Watch Co.. It is a 17 jewel movement. The watch is stem set and wound. The watch winds, sets, runs and keeps time.