Resilient casing ring for casing a horological movement and watch case comprising such a resilient casing ring

A resilient casing ring (200) for casing a horological movement (10) inside a watch case (100) comprising a middle (110), wherein said resilient casing ring (200) comprises an annular body (205) with a central axis (Z), and fastening tabs (210) carried by said annular body (205) and capable of cooperating with said middle (110) to form a bayonet casing system (300) by the rotation of the resilient casing ring (200) relative to the middle (110) about the central axis (Z), between an insertion position and a locked position, said resilient casing ring (200) comprising at least one resilient retaining element capable of cooperating with said horological movement (10) and of exerting an axial force parallel to the central axis (Z) on the horological movement (10) by elastic deformation of said resilient retaining element when said resilient casing ring (200) is in the locked position in the middle (110).