Buck Knife
121 Fisherman
The 121 was introduced in 1964 and the first models had the blade stamp up on the spine of the blade (in 1965-1966 they changed and marked Buck on the ricasso)
So this one was made in either 1965 or 1966
Thin semi flexible blade with fish scaler (this was a weak point on the knife and they discontinued the fish scaler I believe in 1968).
I believe the blade steel would be 440C
Comes with original sheath with NO number on the back
Knife has been used and sharpened
These are RARE and very hard to find