IWC Big Pilot Ref IW500901 46MM is rated 9.7 out of 10. Power reserve sub-dial indicator located at the 3 o’clock position. IWC Caliber 51111, beats at 21,600 vph, contains 42 Jewels & has an impressive power reserve of 7 days or 168 hours. As matter of fact the movement is capable of maintaining a longer power reserve, however the movement is mechanically stopped before all the tension in the spring is exhausted, eliminating the effect of reduced torque in the mainspring as it winds down. It comes with box and paper dated on December 2014.