The invention relates to a watch case comprising a capsule (20) receiving the watch mechanism, arranged along a main axis comprising a front side presenting the dial of the watch, and having a middle part (2) surrounding this capsule (20). having a generally cylindrical housing (4) open towards the rear receiving on this side the capsule (20), characterized in that it comprises a telescope (30) bearing on the back of the capsule (20) , comprising tabs (34) disposed on the outer contour of the capsule (22), which are in a blocking position partially inserted within at least one groove having a circular orientation (14), formed in the cylindrical portion of the housing (4) of the middle part (2).
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