I could make a somewhat educated guess but there are a number of folks on this forum who can answer your question with a lot more certainty. Folks here can also help with what you should do (if anything) to clean and preserve the knife and sheath. Very cool knife. Thanks for sharing.
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Jim E.

“If you don’t know where you are going, you might wind up someplace else.” – Yogi Berra

Me 2020