To obtain an appropriate engaging state between the tooth array of a winding knob and a winding stop lever, between the tooth array and a reverse rotation preventing pawl.

The winding knob 5 is provided with the tooth array 34 where many teeth 34a are formed on its outer periphery, and tooth faces 70a and 70b are asymmetrically formed on each tooth 34a. The tooth face 70b turning in a reverse rotation direction, which is engaged with the reverse rotation preventing pawl 25, out of the tooth faces of the tooth 34a is formed so that a normal 73 extended from the engaging position of the tooth face 70b engaged with the pawl 25 to the outside of the tooth face 70b may be crossed with a line 73a parallel with a direction going from the engaging position of the tooth face 70b toward a supporting part 35 and passing the center of the turning of the knob 5. The tooth face 70a turning in a normal rotation direction, which is engaged with the winding stop lever 62, is formed so that a normal 72 extended from the engaging position of the tooth face 70a engaged with the lever 62 to the outside of the tooth face 70a may be crossed with a line 72a parallel with a direction going from the engaging position of the tooth face 70a toward the center of the turning of the lever 62 and passing the center of the turning of the knob 5.