A. Lange and Söhne Datograph Platinum up and down

A revolutionary idea in the manufacturing & operation of mechanical chronographs. This watch features: Black colored solid silver dial with Applied Roman Numeral & Index Hour Markers. Patented large double window date display located at the top of the dial with quick correction button located on the case edge at the 10 o'clock position. Chronograph movement with flyback function - allowing the stop-watch to be instantaneously restarted for continuous timing, without having to stop, reset and then restart the chronograph. Furthermore the minute hand of the chronograph jumps in 1 minute increments rather than continuously moving - this allows for accurate reading of the timing function. The movement has 40 jewels & beats at 18,000 vph. The movement has an approximate power reserve of 36 hours.

LNIB datograph up/down complete with papers. Preferred asia face to face. Thanks