Patent ID: 6902169

Claim:
A sealing device for a control member of a watch, said control member comprising a shaft passing through a watch casing and an external control member portion disposed outside the watch casing, coupled to the shaft and manipulable by a user to actuate a displacement of the shaft, said sealing device comprising: a tube driven into a bore of the casing, said shaft of said control member engaged in a central passage of the tube, at least one joint ensuring normal sealing between the tube and the shaft, a compression key screwed onto the tube and comprising an upper portion overlying the end of the tube and surrounding the shaft, wherein the compression key is rotatable around the tube independently of the external control member portion, and a compression joint disposed in a space between the upper portion of the compression key, the tube and the shaft, wherein the degree of compression of the compression joint, and thus the degree of sealing provided by said compression joint can be heightened by rotating the compression key with respect to the tube from an open position to a closed position, the rotation of the compression key from the open position to the closed position not causing an axial displacement of the external control member portion.