89. Sector Watch, Tramelan. A silver keyless wind fan form open face pocket watch with jump hour Sector Watch, Tramelan. Montre de gousset en forme d'évantail à cadran ouvert en argent (800) à heure sautante remontoir au pendant Date: Circa 1920 Movement: Swiss lever, cut and compensated bi-metallic balance, Brevet No.27961 Dial: White Enamel, black Arabic numeral hour markers, black outer minute divisions with red Arabic quarters, blued steel spade hands Case: Hinged fan form, engraved back depicting a floating ship, No.1301 Weight: 114,33gr