Cedar Rapids, Iowa. $20 1882 Date Back. Fr. 555. The Merchants NB. Charter #2511. PMG Uncirculated 62.This note comes from a small trove of high grade $20 date backs and the present example retains deeply embossed overprints and stunning detail throughout. Just a touch of rust at the bottom margin is seen and mentioned by PMG in the comments section of the holder. A terrific representation of the type without the hefty price tag associated with Gem material.