| 摘要 |
To provide a portable watch enabling component exchange around a crown when the screw lock capability is reduced. To a case for screw locking a crown, fixed is a winding stem pipe body and a winding stem pipe including an exterior pipe. The winding stem pipe body includes an extracase end section to be arranged outside of the case, and is fixed by brazing to the case to be watertight after inserted into a pipe-attachment hole of the case. To the outer rim plane of the exterior pipe, provided is a male screw section to be screwed together with a female screw section of the crown in a removable manner. To the outer rim of the extracase end section, the exterior pipe is prevented from rotation and then fit thereinto in a removable manner. With such a structure, when the screw lock capability is reduced, characteristically, there is no more need to exchange a watch exterior assembly including the case, and the crown and the exterior pipe of the winding stem pipe for screw locking it can be separately exchanged.
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