https://www.seateddimevarieties.com/date_mintmark/1856o_108page.htm
Liberty Seated Dimes Varieties 1837 - 1891 - 1856o_108page
Gerry Fortin's web-book offers a wealth of new information about Seated Dime die varieties and a format that organizes the previous die varieties defined by...
liberty seated dimesvarieties