Patent ID: 9329577
Filing Date: 2016-05-03
CPC Classification: G04B

Claim Text:
1. A timepiece comprising: a case which accommodates a movement including a lower peripheral bearing surface, the case including a case middle to which are respectively assembled a back cover and a crystal; a clamping element including a lower retaining surface; and the movement includes an upper peripheral bearing surface, the lower retaining surface of the clamping element and the upper peripheral bearing surface being in mutual contact, and wherein the back cover includes an annular peripheral shoulder of constant thickness against which is affixed the lower peripheral bearing surface of the movement, and a hollow central portion of variable thickness and parabolic shape, the movement being compressed between the lower peripheral bearing surface and the upper peripheral bearing surface of the movement, the lower and upper peripheral bearing surfaces of the movement being at least partially superposed, respectively by the annular peripheral shoulder of the back cover, and the lower surface of the clamping element.