Early 1970’s... IIRC the ‘70’s era Buck 110 came with 440C blades rather than the 420HC used now. The Paul Bos heat treat does wonders for 420HC though.

I have a couple 110’s from the Buck custom shop with BG-42 steel. And one from ?Cabela’s? in S30V. This new one in 5160 is almost as tight as the Custom shop knives and unlike one review on Amazon, the blade is well centered. The wood is oak colored, but it’s not Oak. Nice knife.