====== 1954 ====== * Participants of the British Mount Everest expedition at their successful first ascent of the highest mountain on earth bear the [[Rolex]] developed expedition watch [[Rolex Explorer|Explorer I]]. * [[Breguet]] begins production of the [[Breguet Type XX]] [[chronograph]] for the French Air Force. A civilian version is soon produced as well. <- [[1953]] | [[1955]] -> {{tag>Year}}