Regulating body for a wristwatch, comprising: a generator provided with a rotor and a stator with M+N coils, M being a whole number higher than, or equal to, 1; and an electronic regulating circuit having a first load impedance with an adjustable value for adjusting the current in N of said M+N coils, and therefore the rotational speed of the rotor. Only a limited number of coils is therefore used for the braking, the other coils continuing to supply the electronic regulating circuit.

A hand position identification device includes a rotation detection unit that detects a rotation state of a rotor by using an induced voltage generated in a motor for rotating a hand, a storage unit that stores a timing information piece relating to a timing at which the induced voltage exceeds a predetermined threshold, and a control unit that compares a first timing information piece stored in the storage unit and obtained in a case where the hand is located at a first position, with a second timing information piece obtained in a case where the hand is located at a second position, and that identifies the second position as an identified position in a case where a difference between the first timing information piece and the second timing information piece is equal to or more than a predetermined amount.

A hand position control device includes a mode switching unit that is capable of switching between a normal hand movement mode and a manual hand position setting mode and a control unit that sets a pulse width of a driving pulse to be output to a coil of a motor that rotates a hand and sets a manual pulse width of the driving pulse in the manual hand position setting mode to be larger than a normal pulse width of the driving pulse in the normal hand movement mode.