Carl Walther (November 22 ... In order to generate enough capital to build a new plant, he licensed PP and PPK manufacturing rights to Manufacture de Machines du Haut-Rhin, in Mulhouse, France ...

After World War I, Walther continued to build Model 4s. Production ceased in 1929, the year the firm introduced the ground-breaking PP. Over its production period the Model 4 underwent a quartet ...