I got this 1928 S Standing Liberty quarter recently, and I saw in the Red Book that there are two varieties: Small Mintmark and Large Mintmark (but no photos of each are shown). Does this coin have a small "S" or a large "S"? How do you tell the difference? To me, the Mintmark almost looks like an "8." Thanks for any help!
https://www.cointalk.com/threads/1928-s-standing-liberty-quarter-small-and-large-s.45114/ This thread from 2008 covers the subject. Hope it helps.