Patent ID: 7118270

Claim:
A portable watch, comprising: a case band provided with a pipe-attachment hole opening toward both an intracase-band plane and an extracase-band plane, and a first pin-receiving groove opening toward the pipe-attachment hole and also toward at least either the intracase-band plane or the extracase-band plane; a winding stem pipe provided with an insertion section inserted into the pipe-attachment hole in a removable manner from outside of the case band and including an intracase-band end section that extends beyond the intracase-band plane to the inside of the case band, an extracase-band end section including a male screw section, and a second pin-receiving groove opening toward an outer rim plane of the insertion section and facing the first pin-receiving groove; a rotation-stop pin inserted into both the first and second pin-receiving grooves to prevent relative rotation between the case band and the winding stem pipe; a pipe stopper engaged in a removable manner with an engagement groove that extends circumferentially around the outer periphery of the intracase-band end section to prevent the winding stem pipe from being disengaged from the case band; and a crown including a crown main section formed with a female screw section screwed together with the male screw section in a removable manner.