Hiya,
I have a switchblade with stag handles made by Hugo Koller. It also has a small blade, and a corkscrew.
All I can tell you is my dad bought it when we were in europe in 1958.
He bought me a swiss army knife at the same store, which I still have
along with the switchblade.
Swiss stainless steel was crap at the time, both are soft and won't hold an edge long, but it won't rust..