American paper currency first printed during the Civil War Identified by the green ink used for printing one side of the bill Popular term for the US dollar
Another name for United States Note(s), first issued in 1662, and a prevailing nickname for all modern notes of USA [Any Small Size Note you'd find that did not have a green back would have to be an error note ]
One of the legal tender notes of the United States; first issued in 1862, and having the devices on the back printed with green ink, to prevent alterations and counterfeits