Rare Zenith Favre-Leuba & Co. "open face" pocket watch, entirely made of .935 silver, circa 1920. Serial number #2928393 3961. .935 silver case with double caseback and opening glass. White enamelled dial with small cracks, difficult to see, and a few signs of wear, Roman numeral hour markers, small seconds at 6 o'clock. Typical onion-shaped winding crown. Case diameter: 42 mm, weight: 61 g. Powered by a Zenith #2025357 hand-wound mechanical movement. "Up" crown for adjusting the time. Both casebacks are stamped with mark and serial number. The watch is in excellent condition for its age, and keeps good time. Box and papers included. Express shipping with tracking, carefully packaged.