PROCESS FOR PROGRAMMING THE PERPETUAL CALENDAR OF A WATCH AND WATCH FOR IMPLEMENTING SUCH PROCESS

摘要

A process for programming the perpetual calendar of a watch with analogue time display is effected using elements incorporated in the watch. In a preferred embodiment, the parameter to be programmed is read from the second hand of the watch. Passage to the programming mode is effected preferably by a special manipulation of the hand-setting stem. If it is required to programme three parameters, namely the number of the year in a four-year cycle, the number of the month of the year and the number of the day of the month, and if the watch has a hand-setting stem with three positions, each parameter to be programmed is allocated to a position on the stem and the parameters to be programmed are read from the second hand by allocating to the latter real steps corresponding to stopping positions and non-allowable steps corresponding to non-stopping positions.