
Type one or Type two?
I recently acquired this 1981-S Susan B. Anthony and believe it is a proof. The only trouble is, is that there are two types of the coin. The 2021 red book tells me that a certain variation of the 's' mint mark makes the difference between them, but I can't see the 's' well enough under my magnifying glass to decide which type it is. Is there other variations I can use to mark the difference?