The Hamilton 73 watch movement features a jewel-bearing rotor with 23 jewels and a detached manual wind mechanism. Notably, it incorporates the ingenious design of a power reserve display. This display operates by transferring the rotation of the barrel arbor to the hand, and the same gear ratio to a small dial. Consequently, the difference between the arbor rotation and the barrel rotation is visually indicated, all without the need for a complex differential gear. Additionally, the movement provides automatic winding and includes sub-second functionality. Notably, it boasts a power reserve display that ranges from 2 to 38 hours, limited by a banking pin. However, it's worth mentioning that this stated range of 36 hours slightly overestimates the actual run time of 34 hours.