PURPOSE: To accurately and easily perform the correction of time, by performing correction when at least two or more of correction pulses corresponding to the rotary speed of a correction switch were outputted.

CONSTITUTION: When a rotary bezel is rotated at a medium speed, one pulse of a signal (a) is outputted at first and a signal (b) is subsequently outputted by one pulse on the basis of an input pulse A. that is, the signal (b is outputted from the second time of the input pulse A. Because the signal (b) is inputted to the C-input terminal of D-FF33A of a 15-min quick feed control part 31 as a clock, D-FF3A takes in a high level signal in synchronous relation to the falling of the first time signal (b) and the Q-level thereof comes to a high level. Because the Q-output of D-FF3A is supplied to an AND gate 34A as a gate control signal, the pulse on the after the second time signal (b) is outputted from the AND gate 34A. By this method, quick feed due to the erroneous operation of a correction switch is prevented.