Method for programming the perpetual calendar of a watch and a watch for implementing such a process

摘要

A process for programming the perpetual calendar of a watch with analog time display is effected using elements incorporated in the watch. The hand of the watch and the position of the hand is used to indicate the steps of the programming. The operation of the stem places the watch in the program mode. If it is required to program three parameters, namely, the number of the year in a four year cycle, the number of the month of the year and 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 of 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.