This Red Seal 1928 US Note $1 bill is rare! These seldom seen $1.00 Silver Certificates acquired the nickname "Funny Backs" from their unique back design. Dramatically different from the back of any other currency, Funny Backs were printed in only two years - Series 1928 and Series 1934. Their bold, distinctive design makes these unusual Silver Certificates a fascinating conversation piece and an intriguing addition to any collection.