Montre à double tour d'heures
October 14, 1912
This patent was registered in 1912 by Jeanneret-Brehm & Cie. shortly after acquiring Magnenat-LeCoultre but before the name Excelsior Park came into common use. By this time the company was still using the name Usine du Parc in reference to their Saint-Imier factory and had registered the name Speedway Watch Co. in English-speaking countries.
