| 摘要 |
METHOD FOR MOUNTING A CRYSTAL ON A WATCH CASE, TIMEPIECE COMPRISING POSITIONING MEANS FOR A CRYSTAL ON A CASE, CRYSTAL AND CASE INTENDED FOR FITTING OUT SUCH A TIMEPIECE The present invention concerns a method for mounting a crystal on a watch case, a timepiece comprising positioning means for a crystal on a case, as well as a crystal and a case intended for fitting out such a timepiece. The timepiece according to the invention includes: a case (1), a crystal (6) mounted on the case (1), means for securing the crystal onto the case, and angular positioning means for such crystal on said case, such timepiece being characterized in that the angular positioning means are made up, on the one hand, by a notch (14) provided directly on the crystal (6) and, on the other hand by a protuberance (22) which is directly provided on the case (1) and which is engaged in said notch (14). The invention is applied for example to timepieces including a crystal and a case of heat-weldable thermoplastic material.
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