I have three 1970 Proof Sets- 2 of the 3 sets have the same Tall S mint mark (MMS-009) which is correct for that year. One of the sets appears to have a different style S Mint-mark- looks more like the styles from 1973/1974 which doesn't make any sense if this is a 1970 s Proof Set. Opinions Welcomed. Proof Set #1 is the different set from the others. Here are a couple of pics showing the difference. Pic #1 is Proof Set 1- Lincoln Cent Pic #2 is Normal Proof Set- Lincoln Cent Pic #3 is Proof Set1- Jefferson Nickel Pic #4 is Normal Proof Set- Jefferson Nickel
Here are some more pics. Pic # 1 is Proof Set 1- Roosevelt Dime Pic #2 is Normal Proof Set- Roosevelt Dime. Pic#3 is Proof Set1- Washington Quarter Pic#4 is Normal Proof Set- Washington Quarter
it appears to me that the clearer the mint mark is, the lower the relief. In other words, it seems that all of the coins have a m/m from the same punch, but it is punched further into some dies than others. The clearer the m/m the shallower the punch went. This is pure speculation on my part, but it is what I see when I look at them.
I see this is an old thread but I just had the same observation. Apologies if the pics aren't the best.
