How to attach the crystal to the watch case and the clock that constitutes the positioning means for the crystal in the case, and the case and crystal to fit such a watch

摘要

The present invention relates to a method of mounting a crystal on a watch case, and the watch constitutes a positioning means for a crystal on the case as well as a case and a crystal for fitting a clock. The watch according to the invention comprises a case (1), a crystal mounted on the case (1), means for fixing the crystal to the case and angular positioning means for the crystal in the case, Is characterized by a notch 14 directly provided in the crystal 6 and a protrusion 22 aligned with the notch 14 and fitted directly in the case 1. [ The invention applies, for example, to a case of a material welded with heat and a crystal containing phase.