The product is a $20 1882 Date Back National Bank Note from The First National Bank of Nowata, OK, with a blue seal and green back. It is certified by PMG with a grade of 15 and has a serial number of N837514/2266. The note features signatures from Vernon and Treat and is a piece of circulated banknote history from the United States.
Of the more than 12,000 banks that issued currency under this system, only 557 of them were Oklahoma National Banks, from Achille to Yukon. What's more, only about 4,000 Oklahoma National Bank Notes have been reported within currency groups.
As of current the total graded in 15 by PMG is only 6. In fact, this may be the only 1882 $20 Date Back reported from this charter.
This note is a circulated but intact example of a better type and denomination from the Sooner State.