The model no. 312 went through a major development, or the number was used for 2 different models, which had little to do with each other in terms of the functional parts and the structure.
Originally, the No.312 model was a No.306 model with an added saw. It first appears in the 1922 Victorinox catalogue. This model was probably taken out of production a short time later. The released number was then used for a new model, which appears in the catalog from 1932. This "new" Model No.312 featured a corkscrew on the back and a can opener, eliminating the awl and small cutting blade of the original Model No.312.
Victorinox produced this model until around the mid-1960s.
The original variant of the Model No. 312 had a large cutting blade, a screwdriver, an awl, a small cutting blade and a saw. The later model No. 312 had an additional can opener and a corkscrew on the back in addition to the large cutting blade, the saw and the screwdriver.
Material thickness (new model)
Big cutting blade: 2.4 – 2.6 mm; Corkscrew: 2.0mm; Screwdriver: 2.0 – 2.2mm; Can opener: 2.0 – 2.2 mm; Saw: 2.0mm
Structure (new model)
Model no. 312 is a 3-layer pocket knife. The top layer contains the screwdriver and the can opener, the bottom layer the saw and the corkscrew on the back. The middle layer consists of the large cutting blade. The head rivet made of nickel silver, together with the 2 jaws, fixes the wide screwdriver as well as the large cutting blade and the saw; the foot rivet, the can opener, an intermediate layer and the back spring of the lower layer. The middle rivet is used to fix the two scale parts, the two upper back springs and the corkscrew on the back.
Only red fiber was used as the scale material.
When carbon steel was used, the sinkers and rivets were steel; in the case of tools made of stainless steel, the liners and rivets are made of brass, with the head rivet and the jaws always being made of nickel silver and the intermediate layer made of brass.
Trade names: cadet knife, mechanic's knife