Schoverling, Daly, and Gales offered Charles Daly double guns with Infallible triggers as an option on new guns. However, I doubt that they were installed in Germany, probably sent to Lancaster for installation. One early Lancaster catalog has a testimonial from a shooter in Maryland who was quite pleased with the trigger installed in his Golcher (Lindner) ten gauge hammer gun. I own a Golcher-Lindner ten gauge hammer pigeon gun with Infallible trigger that was sold by a D.C. area dealer. I assume it is the same gun. Small world. Bill Murphy