An escapement mechanism including an escape wheel subjected to a rotational torque and a resonator integral with a pivotally mounted regulating wheel set. The escape wheel includes plural actuators regularly spaced on a periphery thereof, each arranged to cooperate directly with at least a first track of the regulating wheel set. Each actuator includes a first magnetically, or respectively electrically charged, or ferromagnetic or respectively electrostatically conductive surface, to cooperate with the first track which is magnetically, or respectively electrically charged, or ferromagnetic or respectively electrostatically conductive, to repel or attract each first surface of the actuator, and each actuator includes a mechanical stop member to cooperate, in an end-of-travel stop arrangement, with at least a first complementary stop surface included in the regulating wheel set to constitute therewith an autonomous escapement mechanism.

Provided is a mechanical timepiece in which rotation is maintained even when a torque caused by a spring force of a hairspring is decreased. The mechanical timepiece includes a power spring, a balance wheel, a hairspring, a permanent magnet, a coil, a soft magnetic core, and rate adjustment means. The permanent magnet is arranged so that, at a position of 0, an S-pole portion is opposed to a first end portion with a first interval and an N-pole portion is opposed to a second end portion with a second interval, and, at a position of 180, the S-pole portion is opposed to the second end portion with a third interval and the N-pole portion is opposed to the first end portion with a fourth interval.

A mechanical timepiece includes: a hairspring; a permanent magnet; a soft magnetic core; a control circuit for performing rate adjustment based on a counter-electromotive voltage caused in a coil by a motion of the permanent magnet accompanying a forward direction motion and a reverse direction motion of the balance wheel. The permanent magnet is arranged so that, under a state in which the hairspring is brought to an equilibrium length, a direction of magnetization is directed to the first end portion side or the second end portion side.