To give torque to revolution of a lid with a simple structure without damaging the lid or a timepiece case, by compressing and inserting an elastic body between the circumference of a rotary support shaft loosely inserted into a hole of the timepiece case and into a hole of the lid, and each hole.

A rotary support shaft 10 comprises two pins 11 having heads 11A formed in a wedge shape insertable easily. The pins 11 are inserted respectively into a pipe-shaped elastic body 13 arranged in a through-hole 22a of a connection base part 22 of a timepiece case 2, and inserted into a pipe 12 in the through-hole 22a so that the heads 11A thereof face each other. And, the pins 11 are inserted into an elastic body 14 in a connection hole 33a of a connection projecting part 33 of a lid 3 interfitted to a connection recessed part 22 formed on the case 2. Then, one ends 11B of connected each pin 11 are inserted into a connection hole 21a bored on a connection leg 21 for connecting a band. Running torque relative to the lid 3 is given by friction between the elastic bodies 13, 14 compressed by insertion of the pins 11 and the pins 11, and by friction between the elastic bodies 13, 14 and each connection hold 22a, 33a.