Chopard Man Automatic 18k 750GG

Adding to my collection of uncommon dials with black-enamel, instead of the usual luminous, painted within the numerals, here is a 1932 Stanley in yellow gf, pretty nicely preserved, except for slight wear to the dial. This was one of the Explorer series of the early '30s, most of which having the 19 jewel cal. 401 rectangular movement (a higher grade of the Illinois 207), and one of the two in gold fill instead of solid gold (the other was the Livingstone, naturally!) not counting the later 10........

Who invented the winding mechanism by movement of a rotor?Some say it has invented by the watchmaker Abraham Louis Perrelet from Le Locle in about 1770.Other historians attribute the invention to the young watchmaker Hubert Sarton born on November 3, 1748 in what is now the Belgian town Lige. Hubert Sarton is said to have invented the winding by rotor in 1778.The watch historian Joseph Flores is of the opinion that the invention must be attributed to Hubert Sarton and he has wrote a book about ........