Friedr. Baurmann & Söhne, Solingen in 1914, 1920, 1922, 1925 and 1932, Beethovenstrasse 76 in 1939, Sandstrasse 27 in 1983. Brand names: 'Alecto', 'Ambidexter', 'Aviator', 'Baurmann', 'Carbonese',...