A mid 20th Century Swiss lever by Patek Philippe in a stainless steel open face case. Keyless nickelled bar movement with going barrel. Plain cock with polished steel micrometer regulator, compensation balance with blue steel overcoil hairspring. Club foot lever escapement, escape pivots with endstones. Signed white metal dial with subsidiary seconds, applied batons and Arabic numerals at the quarters, steel hands. Plain open face case, clip on back with maker's mark “Patek, Philippe & Co Geneve”. Signed black presentation case lined with grey velvet.