hey guys. i was checking thru this site and a few others, looking for ways to figure out the age of schrade/schrade walden knives. i seen on a earlier post, the way to date by the "N.Y. USA" STAMPS, but it seems that N.Y. USA & N.Y. U.S.A. are just general timelines or should i say guides to the age. it says in a earlier post that both stamps range from 1946-1973, with plain N.Y. ranging from 1946-1950's. i have heard that there is no absolute way to age them short of it being a calenar knife, wonder if this is true?? also, i have looked to see what the exact timeline for this company is, was it schrade that bought walden? what years was that? sorry if this all seems trivial to some, but i have keen interest in the dates and such. i have several schrades schrade/waldens. i also aquired a case bare-headed jack knife, real nice knife, and its tang is stamped case xx over U.S.A. its model # is 6202 1/2. any help with it would be appreciated also. and finally, can anyone tell me of a updated book about schrade? i have heard of one from 1974 i think, but that it didnt offer much history. sorry for the long post guys, the forum is slow today!!!