With the 1928-B United States Note $2 above I finally finished my collection of all existing series of small US $2 bills. Was waiting years to get this one because it's kind of pricey, but now finally officially finished; have every series of small $2 bills from 1928 to 2021!
From the time I got the first one to the time I got the last one, over 25 years, but not counting the 2021 I got just last week, it's been years since I added any to the set lol. Finding a compromise to get a "decent enough" condition one but not too expensive took me quite a while, and I'll be honest, kind of forgot to try for long periods of time.