A small early 20th Century Swiss lever in a diamond set gold and enamel open face case. Keyless gilt bar movement with going barrel. Plain cock with polished steel regulator, compensation balance with blue steel overcoil hairspring. Club foot lever escapement. Silvered dial with Arabic numerals, blue steel hands. Small 18 carat open face case, clip on back with translucent light blue enamel over a radially engine turned ground. White metal applied decoration to the centre and border, both set with small diamonds.