Peter Altenbach & Söhne, Schwanenwerk, Solingen in 1925, 1928 and 1932. Brand names: '4S', 'Ariston', 'Aso', 'Canorust', 'Century', 'Cutwel', 'Efeu', 'Finedge', 'Fortunato', 'Fulmine', 'Heavy Weight Professional', 'Lifetime', ,Northlight', 'Omar', 'Pas Pas', 'Pausos', 'Pompadour', 'Rustpruf', 'Securitas', 'Spark', 'SS', 'Success', 'Taileffer'. Open-blade razor maker.