Sweet pair.
Where is the steel type marked?
I have sweet toothpick from 2000 w/o the steel marked, but the seller, Vintage Knives, told me it was ATS34 because it is marked 2000 and all S&M knives in that series marked 2000 are ATS34. However, I have other S&M knives not from 2000 that are marked in the blade etch ATS34. On the defunct knifeforums I was told that almost all 2000 S&M are ATS34, but some toothpicks are 420HC but the steel is not marked. Personally I think my knife is ATS 34 because I believe Billy at Vintage Knives

and I use the knife and it “performs” like ATS34.
I paid $125 for mine in 2002. It’s a great kitchen knife especially for making small surface cuts in a lamb roast for sting in garlic.