Watchcase

A watchcase assembly for attaching a thin [flat] crystal to the watchcase, said crystal being substantially coextensive with said watchcase, said assembly comprising a plurality of separate fixation members attaching the watchcase to the crystal, said fixation members each having inwardly directed grooves sized to receive the edges of the crystal, said grooves comprising parallel facing surfaces spaced apart a distance slightly greater than the thickness of said thin [flat] crystal to engage said crystal, a sealing strip applied against the perimeter of the lower face of the crystal in the region of said fixation member, the upper face of said parallel facing surfaces bearing against the upper face of the crystal, the area of contact at the fixation member between the sealing strip and the lower face of the crystal and between the upper surface of said facing surface and the upper face of the crystal being vertically aligned with each other, the dimensions of the fixation member being substantially smaller than the corresponding dimensions of the crystal, further comprising a retaining ring comprising at the top thereof a bearing surface for the sealing strip and means for thrusting the retaining ring towards the crystal thus pressing said sealing strip against the [inner] lower face of the crystal.