| 摘要 |
External extension piece for a case of a watch or jewel. The extension piece is removable and includes, for housing an auxiliary function or a particular component, at least one housing which is delimited by a body of substantially annular shape, this body being held confined and clamped between, on the one hand, a base, and on the other hand, a cap including an aperture at the level of each this housing, by a securing and clamping means or by screws. This cap includes a continuous elastic holding means around and inside this aperture. This housing confines a spherical moving element with minimum play projecting through this aperture. |
