A late 19th Century Swiss lever in a gold set agate open face case. Gilt three quarter plate keyless movement with going barrel. Plain cock with polished steel micrometer regulator, compensation balance with blue steel overcoil hairspring. Club foot lever escapement. Signed white enamel dial with subsidiary seconds, Arabic numerals, pierced gilt hands. The body of the open face case formed from a solid piece of polished agate carved out to house the movement. Gold screw bezel, pendant and bow.