16th Grand Prix d’Horlogerie de Genève (GPHG). See the winning watches
The “Aiguiile d’Or” Grand Prix to Ferdinand Berthoud for the Chronomètre Ferdinand Berthoud FB 1 model. The watchmaking art was
The “Aiguiile d’Or” Grand Prix to Ferdinand Berthoud for the Chronomètre Ferdinand Berthoud FB 1 model. The watchmaking art was