Single Hand Wristwatch
Using a single hand as both hour hand and minute hand: the end part of the hand is shorter than the head part of the hand. The head of hand indicates the minutes. The hours are indicated by the end of hand with the inner hour dial rotating no nsynchronously to follow the hand end.
There are two parts of the dial – the fixed outer minute dial and the inner hour dial which can rotate.
The hand revolves at the speed of passing a circle in 60 minutes to indicate the minutes by the head of hand. In the mean time, the inner hour dial rotates no nsynchronously at the speed of passing 11/12 of a circle in an hour, to indicate the hours by the hand end.