Gold Open Face Swiss Lever

An early 20^th Century Swiss lever in a nine carat open face gold case.  Gilt three quarter plate keyless movement with going barrel. Plain cock with polished steel regulator, uncut bimetallic balance with blue steel spiral hairspring. Club foot lever escapement. White enamel dial with subsidiary seconds, Roman numerals, gilt hands. Engine turned 9 carat open face case, the back with vacant cartouche and garter, plain gold cuvette.  Tan morocco presentation case lined with purple velvet.