The large, precise, hand-wound movements in the 59000-calibre family have an 8-day power reserve, but could theoretically run for 9 days. The extra day in reserve ensures that the movement maintains as constant a driving torque as possible and continues to run precisely. The movement is stopped mechanically before the reduced torque can cause it to start running inaccurately. This also means that the owner can safely wind the watch once a week. The indexless balance has a frequency of 4 hertz (28,800 beats per hour) and, together with the Breguet spring bent into shape in accordance with age-old watchmaking tradition, helps to make the watch exceptionally accurate.
IWC
Pre-Owned IWC Spitfire Mission Accomplished Watch 46.2mm Green Bronze IW510506
Pre-Owned IWC Spitfire Mission Accomplished Watch 46.2mm Green Bronze
Excellent Condition. No scratches on crystal. This watch is in excellent operational as well as cosmetic condition and comes complete with Complete Original Boxes, Papers, cloth and the Majority of Time Remaining on the Factory Warranty.
1 Owner Watch, Original Purchase Date March 8, 2021
#425 of 500
Serial #6253373
