Start a new collection or update yours with Uncirculated Philadelphia “P” and Denver “D” mint mark issues featuring the first 16 U.S. Innovation dollar designs. Start with 2018's coin featuring George Washington’s signature on first U.S. patent through to latest honoring Kentucky and the birth of bluegrass music! The reverse features a banjo, the instrument that defines this unique American blend of traditional English, Scottish, Irish ballads with African-American blues and jazz. The genre derives its name from native son Bill Monroe and the Blue Grass Boys. Buy all 32 coins listed and SAVE!