I've read a few articles about trap spring knives and have made a couple from old trap springs. I'm sure a local smith would have used what ever they had available to make a knife back in the day.
The only reference to a trap spring knife that I can recall is in regards to the rat river trapper. The mounties had found a trap spring knife in with his gear. I think they threw it into the river along with some of his other gear, they kept some of his gear too. this took place if memory serves mid 1920s or so. Any thoughts on trap spring knives from a historical point of reference?
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