| 摘要 |
A timepiece including a ring (6) which assures a quadruple function: that of a water-tight packing between the crystal (1) and the ring; that of securing the caseband (3) to the ring; that of a casing ring for the movement (5) and finally that of securing the back cover to the ring. To this effect the caseband exhibits a cylindrical internal wall (4) entirely overlaid by the ring, said ring exhibiting a first accommodation (8) in which the crystal is engaged, a second accommodation (10) in which the movement is engaged and a lower zone (11) including means (18, 19) for securing the back cover.
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