While often viewed as a novelty, the U.S. $2 bill boasts a surprisingly extensive history and a range of special varieties. Starting with the Series 1918 note, issued during World War I, to the present Series 2006 https://unitedstatesofamericacoi656799.wikicorrespondence.com/7199852/discovering_the_types_a_guide_to_u_s_2_notes