Now that is interesting Roger. I've always wondered about the 1967 SMS production....many of those coins actually do look pretty similar to the proofs from earlier in the 1960s. I've seen some 1967 SMS Kennedy Halves that actually look very similar to the 1964 and 1968-S Proofs. They were definitely made with more care than the previous two SMS issues. The looser quality control would account for the marks you see on the 1967 coins from time to time, but it was also noticeably better than the quality control on the 1966 and especially the 1965 issues. The production of the 1967 SMS coins and what they actually are is pretty interesting. I've seen some 1967 SMS and 1968-S Proof issues of all five denominations that if one were to place them side by side and explain the differences between the two coins, it would be quite difficult to do, honestly. The 1965 issues, the difference is very easy to see and explain. Compared to true proofs, the 1965's are terrible. Not so with the 1967's.