Device for counting and displaying a time unit fraction

A device for counting a number of time unit fractions or a number of movement unit fractions of a mobile member, the device comprising:

• a first cam having a first surface, the first surface being a cam surface, the first cam being configured to be driven by the mobile member;
• a second surface, the second surface being an abutment surface;
• a mobile support urged by a first spring;
• a mobile pawl mounted on the mobile support and urged by a second spring toward the first surface, the pawl being adapted to cooperate with one or the other of the first and second surfaces according to the position of the mobile support;
• and
• a control system adapted, in a first non-counting state of the control system, to maintain the mobile support in a first position wherein the mobile pawl cooperates with the second surface, and, in a second counting state of the control system, to allow the movement of the mobile support, wherein, in the movement of the mobile support urged by the first spring, the mobile pawl cooperates with the first surface.