Wristwatch

A watch comprising:

• a display (11);
• an electronic circuit (12) controlling operation of the display (11), and the electronic circuit (12) having electrical contacts;
• a time set stem (13), and
• at least two electrical contact elements (14, 14″) controlled by the time set stem (13), each of the at least two electrical contact elements (14, 14″) alternately opening and closing an electrical connection with one of the electrical contacts of the electronic circuit (12), when the time set stem (13) is rotated, to generate electrical impulse signals transmitted to the electronic circuit (12) for controlling operation of the display (11);
• wherein the time set stem (13) has at least one helicoidal element (20, 20′, 20″, 24, 24′) which extends along a helicoidal zone (19) of the time set stem (13), and when the time set stem (13) is sufficiently extending from the watch, the at least one helicoidal element (20, 20′, 20″, 24, 24′) cooperates with the at least two electrical contact elements (14, 14″) to move alternately the at least two electrical contact elements (14, 14″) in and out of contact with the electrical contacts of the electronic circuit (12), for opening and closing the electrical connection of the electronic circuit (12), upon rotation of the set stem (13);
• and
• the time set stem (13) comprises a set crown (15), a larger diameter cylindrical zone (17), a smaller diameter cylindrical zone (18), and the helicoidal zone (19) is located between the smaller and the larger diameter cylindrical zones (18, 17).