The No. 73 model is probably the least common model of the 70 line. It was created in the 1930s. The production time was relatively short. Like the other model in the line, the Model No. 76 with corkscrew, the Model No. 73 was completely withdrawn from production no later than the 1950's and has not been produced again since.
In terms of price, model no. 73 was identical to model no. 72 (cf. catalog 1936), even if model no. 73 was considerably more complicated in terms of construction.
In addition to a large and a small cutting blade, model no. 73 had a corkscrew on the back.
Big blade: 2. 4mm; small blade: 1.2 mm; Corkscrew: 2.4mm
A rivet hidden under the scale fixes the back spring. The corkscrew is attached to the center rivet, while the small and large blades are attached to the foot and head rivets.
The back spring (see photo below right) was ground down on one side on the inside to enable the use of the corkscrew without losing the tension on the large and small blade at the same time.
Black oxidized steel, cellidor in imitation mother-of-pearl, horn, tortoiseshell, mother-of-pearl and engine-turned steel were used as the scale material, but never aluminium.
Liners, interlayer, rivets
The liners and the intermediate layers were made of nickel silver, as were the rivets.