"True" trinary note. The serial number contains only three different digits (trinary) and in this case, 0, 1 & 2 ("true" ... as the next step up from a binary 1s & 0s note). This one also very low sum (add up all the digits and you get 5, the lowest possible for a trinary being 3).

Found this one in the wild, selling, excellent condition.
https://www.ebay.com/itm/136962912485

See my eBay page for a bunch of additional new listings.
https://www.ebay.com/usr/mpoloukhine