PURPOSE: To simplify assembly work by installing a print board, which is provided with a crystal oscillating circuit, frequency dividing circuit, motor driving circuit, and the input terminals of these circuits, on a coil frame of a motor to form the internal structure in blocks.

CONSTITUTION: An hour meter is equipped with a mounting plate 1, displaying wheels 2, pinions 3, shafts 4, coils 5, 10, a transmitting wheel 6, a rotator 7, magnets 9, etc. The middle part of the print board 1 is provided with a lead-wire connecting part 11a, while both sides of the board 1 are provided with recess parts 11b. In the print board 1, an input terminal part 11a is provided inside a wire introducing window 12a of an outer case 12. A bare part 17a of lead wire 17 is inserted through the wire introducing window 12a and soldered by a soldering iron. Since in this hour meter the deep part of the lead wire introducing window is equipped with the input terminals of the print board, the bare part of lead wire can be connected only by inserting through the lead wire introducing window 12a and soldering, thus simplifying assembly work.