Jaeger-LeCoultre Duometre a Chronographe 18K Rose Gold

Jaeger-LeCoultre Duometre a Chronographe, Q6012420, 601.24.20, 6012420, 18K rose gold on a strap with an 18K rose gold deployant buckle, silver dial with applied rose gold Arabic numerals and hour markers & painted black index hour/minute markers, manual wind JLC caliber 380A movement, the "Dual Wing" is powered by 2 separate mechanisms that drive the two features of the watch (time & chronograph), each of the two mechanism have their own 50 hour power reserve which are independent of each other, power reserve indicator with rose gold hand located at the bottom left side of the dial, chronograph (hour & minute counters set in 1 sub-dial display located at the right side of the dial, at the bottom is a window that displays a rotating disc indicating the minute in units of 0-9, a 1/6th of a seconds "Lightning Seconds Hand" (Foudroyant) is located at the 6 o'clock sub-dial, sapphire crystal, water resistant to 50 meters. Diameter: 42mm, Thickness 13.4mm. Like New with JLC box (the exterior of which has deteriorated) and papers dated 2009.