Importance

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Abstract

An electronically controlled mechanical watch includes a time indication device including a time indication wheel train configured to indicate a time using a transmitted torque of a mechanical energy source, a circuit board on which a crystal oscillator, an electronic control circuit configured to adjust a rotation speed of the time indication wheel train based on an oscillation frequency of the crystal oscillator, and a plurality of logical regulation setting patterns are disposed, and a rotary switch including a conduction portion, the rotary switch being configured to rotate with respect to the circuit board to select one of the plurality of logical regulation setting patterns, conducting to the conduction portion, wherein the electronic control circuit includes an oscillation circuit, a frequency divider circuit, and a logical regulation circuit configured to control the frequency divider circuit based on a conduction state of the conduction portion and the logical regulation setting pattern.

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First Claim