Between the years 1976 and 2003 Victorinox produced the GAK (German Army Knife) in the size of 108mm.
The GAK was the first model in the series of the 108mm knives and the first knife who used nylon scales.
Victorinox used the GAK design in order to create civilian models.
Most of the 108mm models is no longer produced and become collectors' items.
The Walther is a special edition that was made in 1996-97. Only 4.972 pieces were made.
It's the only 108mm knife with black scales.
(info: SAAM's 108mm Overview)