1897 perret s associe à louis edouard berthoud pour fabriquer des montres de poche ... complètes un an plus tard perret berthoud présente l universal watch extra ... chronographe doté d un compteur de 30 minutes avec ... son chronographe-bracelet produit en 1917 l entreprise sera la ... and ulysse georges perret two talented watchmakers from le locle founded a company ... specialising in making complicated watches five months later they filed a patent ... for the invention of a 12 and 24-hour watch with instant-jump mobile disc an export ... perret associated with louis edouard berthoud to make complete pocket-watches a year ... later perret and berthoud presented a chronograph equipped with a 30-minute chronograph ... with its first wristworn chronograph produced in 1917 the company was the ...
