Longines. Chronographe stop watch à rattrapante en acier remontoir au pendant Longines. A stainless steel keyless wind open face 1/5th split second chronograph stopwatch Ref 4507, Circa 1955Longines. Chronographe stop watch à rattrapante en acier remontoir au pendantLongines. A stainless steel keyless wind open face 1/5th split second chronograph stopwatch Reference: 4507Date: Circa 1955Movement: 21-jewel manual wind, No.9686436Dial: Silvered, black Arabic numeral hour markers, black outer 1/5th second divisions with 5 minute hour markers, subsidiary dials at 6 and 12 for seconds and 30 minute recording, blued steel leaf hands, blued steel centre chronograph handsCase: Polished round, snap on back, inner cap, start/stop button in the stem at 12, split second button at 11, quick set buttons at 1, No.P9686436Signed: Case, dial & movementSize: 66mm Accompaniments: Fitted Longines leather box with neck strapNone