A watch case includes a capsule receiving a watch mechanism, arranged along a main axis, and which includes a front side that has the watch face. The watch case further includes a middle surrounding the capsule and provided with an essentially cylindrical housing open toward the back from which side it receives the capsule. The watch case further includes a bezel placed against the back of the capsule. The bezel includes tabs arranged on the outer contour of the capsule, which are in a blocking position partly inserted in the interior of at least one groove having a circular orientation, produced in the cylindrical part of the housing of the middle.