Abstract: In a preferred embodiment, there is provided a wrist watch casing having push-button mounting apertures and conduits thereof extending laterally through the casing structure from the interior space to exterior space, and within the conduits each respectively is a shaft having an outwardly directed end of uniform cross-section extending along the longitudinal axis of that end of the shaft, with the distal outer terminal end of the shaft being clipped-off at a predetermined point and mounted on the remaining outer end of the shaft there being a button having a receptacle fixedly mounted.