Patent ID: 7357569

Claim:
A portable watch comprising: a case having a pipe-attachment hole extending therethrough; a winding stem pipe comprised of a winding stem pipe body and an exterior pipe, the winding stem pipe body having an inner section inserted into the pipe-attachment hole and fixed to the case in a watertight manner and an outer section that extends out from the exterior of the case, the exterior pipe being removably slidably inserted over the outer section of the winding stem pipe body and having on its outer periphery a male screw section; means on the outer section of the winding stem pipe body cooperating with complementary means on the exterior pipe for preventing relative rotation between the winding stem pipe body and the exterior pipe; and a crown having a crown tube slidably extending into and rotatable in the winding stem pipe body and a female screw section removably screwed onto the male screw section to screw lock the crown against unintended rotation.