Model No. 7 appears for the first time in the 1922 catalogue. In addition to a large cutting blade, it had a so-called flute blade. This was used to drain blood from animals. This was a recognized and proven procedure in veterinary medicine at the time.
Model No. 7 was only produced in 2 sizes, 106 mm and 100 mm. Carbon steel variants are still listed in the 1952 catalogue, but not in the 1964 catalogue. The variants in carbon steel affected only the large cutting blade. The flute blade was always made of rust-resistant steel as soon as possible, probably for reasons of hygiene.
Pocket knife No. 7 had a large cutting blade and a flute blade. There was an optional hanger for this model. Model No. 7 was a 2-layer pocket knife.
Big cutting blade: 2.5 mm – 2.8 mm; Flute: 1.8 mm
On the No.7 model, the head rivet held both blades in place. A center rivet attached the back spring. The upper tier was that of the large cutting blade, the lower tier for the flute blade. The back spring had a cut-out there so that the tip of the flute blade could be lowered well when the blade was closed.
Victorinox originally used black fiber scales as the material for this pocket knife, later also class I and II horn and red fiber instead of black fiber.
The rivets and liners were made of steel or brass, the jaws of steel or nickel silver, depending on the version. The high-quality, called "fine version", used rivets and liners made of brass as well as jaws made of nickel silver and rust-resistant steel for the tools, if this was already available.