Ed, generally speaking, 1965 is the date thrown around for the 'Made In USA' addition. I have seen an original boxed set of skillets from the early 70's that was NOT imprinted with 'Made In USA.' If there is one thing Lodge was back then, it was NOT being uniform in its transition of ALL pieces to new labeling. It would be nice if the piece was older, but the markings just don't show it to be.