This watch is also known as:
403032, 403-032, 403/032 .
The A. Lange & Sohne Datograph Flyback Model #403.032 features instantaneous reset-to-zero activated by lower chronograph push-piece flyback function allowing the stop-watch to be instantaneously restarted for continuous timing, without having to stop, reset and then restart the chronograph.
The revolutionary A. Lange & Sohne Datograph Flyback 403.032 is housed in 39-mm 18K rose gold case with screw-in 18k rose gold fluted crown and sapphire crystal caseback secured by 6 screws. An anti-reflective sapphire crystal protects the silver dial with Arabic numeral markers, patented large window date display at 12 o'clock position and two gray subdials -- 30-minute totalizer at 4 o'clock position and small seconds sub-dial at 9 o'clock position. A black crocodile leather strap with 18K rose gold tang buckle finishes the magnificent look of this men's watch.
The A. Lange & Sohne Datograph Flyback 403.032 is powered by an mechanical movement with manual winding using Lange Caliber L951.1 engine with 18,000vph, 40 jewels, 405 parts and 36-hour power reserve.