Adding 59 thru 74 Proof run to the end of my 8100 Album, I know the 60S has a large and small date type, and the 70S has the high and low 7 proofs. Now I'm wondering if any other 1970 era S proofs have like a type 1 or 2 ? I think not....Right? No other varieties? Those started with the mm in 79 and 81, right? Thanks GF