Who invented the perpetual calendar electronic watch?

1926, the first self-winding watch was invented. Since 1960, traditional round watches have been widely accepted. The further improvement of Swiss watches is to miniaturize the chronograph, calendar, tourbillon and automatic clockwork of pocket watches and install them on watches. 1952, the United States, France and Switzerland produced the first electronic watch. 1967, the electronic watch center in Neuchatel developed the first timely watch, and started mass production under different Swiss brand names in 1970.