Oscar, the Schacht lens seller is a little confused, isn't he? "You must open the lens to focus, then stop down to the taking aperature." He's thinking SLRs; wonder if he actually opened the diaphragm for focusing on his Canon 7?
Maker's name is Albrecht Schacht, located in Ulm, Donau in western Germany, product name is Travegon. I don't know if they're still producing camea lenses, but I don't hear that name as often now as decades ago.