Watch case comprising a capsule held in place in a middle by a rear bezel

A watch case comprising a capsule receiving a watch mechanism, arranged along a main axis comprising a front side configured to receive a watch face of the watch mechanism, and comprising a middle surrounding said capsule provided with an essentially cylindrical housing open towards a back of the middle from which side it the middle receives the capsule, wherein said watch case comprises a bezel placed against a back of the capsule, the bezel comprising tabs arranged on an outer contour of the capsule, with the housing having, relative to the main axis, an angular position for assembling the capsule and the bezel through an axial sliding into the housing of the middle, and a different angular position for blocking the bezel in which the tabs are partially inserted into at least one groove having a circular orientation produced in a cylindrical part of the housing of the middle.