Victorinox developed the No. 651 model in the early 1950s and only produced it for a few years. This model cannot be found in the official catalogues. Only the version shown below with Cellidor scales and visible riveting is known.
It is unclear why this model disappeared again shortly after its appearance. The lack of market demand was often the decisive factor in the disappearance of knife types. Model no. 651 is very similar to model no. 653, which also got by with two springs, but also had a nail file. In terms of production costs, model No. 651 was comparable to model No. 653, but offered one less function. However, the addition of the nail file seems to have been an essential benefit for many, especially with pocket knives of this small size.
The pocket knife had a large blade and scissors and was also equipped with tweezers and a toothpick. This makes it the only 74 mm model with two functional parts that had these additions.
Big blade: 2.2 mm; Scissors: 2.2mm
The structure consisted of two identical springs and the two functional parts. In addition, liners and rivets made of nickel silver were used.
The scale was made of red cellidor with an inlaid cross and shield of nickel silver.