Portable watch

A portable watch, comprising:

• a case band provided with a noncircular pipe-attachment hole opening toward both an intracase-band plane and an extracase-band plane;
• a winding stem pipe provided with an insertion section having an outer periphery having a noncircular shape that corresponds to the shape of the noncircular pipe-attachment hole and inserted in a removable manner into the pipe-attachment hole from outside of the case band, an intracase-band end section that extends beyond the inside surface of the case band into the interior of the case band, and an extracase-band end section including a male screw section;
• 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.

A portable watch comprising:

• a case body having a noncircular pipe-attachment hole extending therethrough;
• a winding stem pipe removably inserted from outside of the case body into the pipe-attachment hole and having a noncircular outer peripheral portion that cooperates with the noncircular pipe-attachment hole to prevent relative rotation between the case body and the winding stem pipe, an inner end portion that extends beyond the inside surface of the case body into the interior of the case body and an outer end portion that extends out from the exterior of the case body, the outer end portion having a male screw section and the inner end portion having an annular groove around the outer periphery thereof;
• a stopper removably engaged with the groove and abutting with an interior surface of the case body to prevent withdrawal of the winding stem pipe from the pipe-attachment hole and being disengageable from the groove to permit withdrawal of the winding stem pipe from the pipe-attachment hole;
• and a crown having a crown main section that has a female screw section screwed together with the male screw section to removably connect the crown to the winding stem pipe.