I believe this is a Ruana 10A (Smokejumper) "M" stamped knife (1962 - 1983). 7 1/2" overall length with 3 3/4" blade. Like all Ruanas, made with quality in Bonner, Montana. Stop in if you're ever close, it's worth a visit. Dovetail elk horn scales are in excellent condition. Part of the peened portion of one rivet is missing but scales are very tight. Blade has had some moisture damage and has a fair amount of pitting which adds to it's character. Blade has no rust and retains a keen edge. Sheath has been oiled, hence it's darker color but Buck w/Crossed Knives stamp is clearly visible. All stitching, snap and rivets are in excellent condition. Ships only to lower 48 states. On Apr-15-13 at 09:29:13 PDT, seller added the following information:
UPDATE: It was courteously pointed out that this IS NOT a model 10A. Wish I knew for sure what model it is. The dimensions provided in the original description are accurate and the knife is definitely in a 23A looped sheath. Sorry for any confusion with this listing.