Are all 1970 small dates valuables. I do have one small date and large date in 2 seperate proof set of 1970 San Francisco Mint. I don't know about other mintmark like P,D and S not a proof set.. Yes it's valuable all small date of 1970 S ..but it depends with the look of the coin.. If your coin is ugly is less valuables. But if it Gorgeous Wow! it will be a lot of penny maybe 7,000 penny for 1c of 1970s...:goofer::hammer: heres the pic of my GORGEOUS ONE! small date 1970 S Proof. WOW!