Michael..
It's an old Rudy Ruana to be sure...I first thought it was a model 20A, but it's not a 20A blade, and just 1 aluminum pin holding the Elk inserts on. I couldn't find any older Ruana's that had the single pin in the handle other than the 10A and 10B, and I'm positive it's not a 10A... maybe Pappy will chime in...he should know.
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Rex Buckner
RKS ~ 5119
RKCC ~ CM-013