Patent ID: 7111977

Claim:
A portable watch, comprising: a case band provided with a pipe-attachment hole having a female screw section; a winding stem pipe extending through the pipe-attachment hole and having a first male screw section screwed together with the female screw section to removably attach the winding stem pipe to the case band, an intracase-band end section extending inside the case band and having a screw section that is a reverse screw from that of the first male screw section, and an extracase-band end section extending outside the case band and abutting an outer surface of the case band and having a second male screw section; a clamp ring screwed together with the screw section of the intracase-band end section in a removable manner and engageable with an inner surface of the case band to hold the extracase-band end section in abutment with the outer surface of the case band; a waterproof gasket sandwiched between the case band and the winding stem pipe; and a crown having a crown main section having a female screw section screwed together in a removable manner with the second male screw section.