Longines wrist chronograph with Central Minute Counter
(ref. 5699), patented in 1942
Oversized Chronograph (39.5 mm) with long red central minute register hand (patented in 1942), Longines manual movement cal. 13ZN 12, two-body waterproof case, screw back case, matte silvered dial, 1/5 of a second scale, outer blue telemeter scale, inner blue tachymeter scale, luminous blue steel hands, two subsidiary dials representing 12-hour register and constant seconds, manufactured in 1945.