The following advertisement was found in the 1905 edition of Deutsche Jagd und Deutsche Fürsten by fritz Frenzel

In 1881 the gunmaker’s periodical Der Waffenschmied carried an article about Collath’s development of a single set trigger for his center fire rifle.

The following images of a Collath gun that is a two barrel set are courtesy of Mr. Fredrik Franzén in Sweden.

Following are more images from Fredrik Franzen of a W. Collath double rifle with a Clam Shell (Mussellverschluss) action.

The following images are courtesy-