Found these 2 in the same roll and thought it was odd that the mint marks look so different. RPM? Also in the same roll was this 1974s looks like maybe a clogged die? Any info would be very helpful. Thanks.
Found this article. Doesn't specifically mention a "skinny" S like you have but it does mention that it seemed to be a transition year for in 1969 a new obverse mater hub was used.
I read some remarks from some known experts...calling these normal since a majority of the coins had lots of minor issues.
I do find "skinny" mintmarks from time to time but there doesn't seem to be any interest in them. As for RPM's, I can't really see. Need a 'blown up" area with the date/mark.