The model with the number 620, later known as the " Princess ", was the first 58 mm model that Victorinox produced. It was developed and put into production in the late 1930s. Right from the start, all functional parts were made of rust-resistant steel.
This model remained the only one in size 58 mm for almost 20 years until the model with scissors, model no. 623, was added.
The first knives of this type had curved springs tapering off at the riveting point, which were adapted to the shape of the spacers and formed a conclusion with them. These springs disappeared in the 1940's and were replaced by new ones. The old springs had a black coating to protect against corrosion.
For a long time, the rivets were made of nickel silver. Brass was rarely used as a riveting material. The liners were made of nickel silver.
Due to the simple structure and the small size, this model was ideally suited as a promotional knife and was widely used in this area. The scales were mainly made of Cellidor in the colors black, red and white, with the models in white and black disappearing again in the 1950s. There were also models with metal scales, aluminum scales or celluloid.
On the Cellidor models, the company logo was made of nickel silver on the promotional knives and placed in the scales. The lettering was engraved on the metal scales, which were initially made exclusively smooth and without guilloche. In rare cases, there were also engravings on the models with cellidor scales, whereby the indentations created by the engraving were colored or filled with a colored mass.
The model consists of two scale parts and normally two circuit liners. Each rivet fixes a functional part or a spring. Model No. 620 consisted of a minimum of 10 total manufacturing parts: 4 rivets, 2 bowls, 2 springs and 2 functional parts (knife, nail file). This allowed costs to be kept to a minimum.
The rivets were visible on the Cellidor bowls until about 1957. The two scale parts were then pressed onto the circuit liners via the rivets and thus connected/fastened
Earlier variants did not have a key ring. When the key ring first appeared, it was attached to the base of the pocketknife, but a short time later it was attached to the head rivet.
Production of the model was discontinued around the end of the 1990s.