Can you guys help at all with any info on this one? Found early this am on my yard sale rounds. Knives are scarce up here in the tundra, so I've made a habit of asking folks if they have any knives "in the house"? "laying around"?, etc, etc. Well, finally, after thousands of inquiries, these unexpectedly came out early today from the female side of the elderly couple

. Go figure. I ask at every sale. This little bugger is solid and tight.
Tang reads: "Iros"-'A diamond shape'?-then "Keen"
Handle material is natural, any ideas what material perhaps? Age? Mfr? My books are a dead end ! Grateful for any info. Thanks guys.

-Glenn