Hamilton cld Watch Story and the Technology Behind Them

Hamilton claimed its cld principle was a simple application of friction between the crystal, gasket, case bezel and case back, which they tested to see if the approach guarded against dirt and moisture. The crown stem assembly was also sealed with gaskets. Some claim that it was Hamilton’s effort to build a waterproof watch. I have seen no documentation to that effect and I have looked. Regardless, they set a new standard for the watch industry and propelled themselves ahead of their competition.