LONGINES MONOPOUSSOIR, CIRCA 1910

Rare, well-preserved chronograph in 18 kt yellow gold, round-shaped, hunting-back case, single pusher, manual-winding movement, Dial White enamel/lacquer dial with black Arabic numerals, dual sub-dials (running seconds & 30-minute recorder), outer multi-color telemetry & tachymetry scale in French ("Calculé par 100/1000 mètres...").  
Functions: Hours, Minutes, Chronograph, Telemeter.  Black alligator-embossed leather strap. 

Dial, case and movement signed and numbered
Condition: Very good vintage condition with rich age patina. 

Diameter 33 mm