It was a 1922 plain, no mint mark, the rarest of them all, IIRC? Or second rarest, other than one of kind errors....
I still have what I collected when I was younger. A lot of variety. like a civil war .25 paper currency, US.
a $5 WWII Hawaii Currency bill.
My father's Short Snorter. He was a pilot in WWII. Taught the WASPs in 1944.....And Glider Pilots that landed in Normandy, D-Day....
A variety of overseas currency.
The first year The British Crowns were Machine made.
Lots of variety...