An Antique Gold Filled Open Face Pocket Watch by Keystone Watch Case Co

An antique open-face pocket watch featuring a gold-filled case manufactured by the Keystone Watch Case Company, U.S.A. The white enamel dial displays black Roman numeral hour markers and a railroad-style outer minute track. A sunken sub-seconds dial is positioned at the 3 o’clock mark, indicating a sidewinder configuration. The watch features blackened steel spade-style hands. The interior of the case back is stamped with the Keystone Watch Case scales trademark, the serial number 7318896, and U.S.A. A circular monogram for the James Boss Watch Case Co is also present. The movement is a manual wind pendant-set type; the specific maker and calibre are unknown as the movement is not visible, though similar examples from this period circa 1910 often contain Swiss or American movements.
Case diameter: 48mm.