Swiss 18 carat gold open faced lever pocket watch Circa 1928

A Swiss gold open faced keyless lever pocket watch, circa 1928. Manual winding jeweled gilt movement with moustache lever escapement, cut bimetallic balance, index regulator. Hinged gold cuvette engraved for ‘Chester R. Pieper La-Crosse, Wisconsin’. White enamel dial, Breguet numerals, outer minute rail track and subsidiary seconds. 18 Carat gold case, plain polished case. Case, cuvette and movement signed and numbered, dial signed. With an Extract from the Archives.