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, black Arabic numerals, blue steel Breguet hands. Plain open face case, clip on back with maker's mark “Patek, Philippe & Co Geneve – Acier Staybrite”. Gilt tooled blue morocco presentation case signed “Goldsmiths & Silversmiths Company Ltd”, lined with blue velvet.