Quote:
The only circulated binary I would keep would be all 1s and 0s.

with @SteveinTampa, that the only binary # note is a note with a serial # of
ones &
zeros. "Binary" refers to machine code (
1 -yes or
0 -no). It's either
one Or
nothing so to apply the concept to other digits makes zero (no) sense. I'm sure the "binary" term was hijacked (& tagged to any 2 digit serial #) by the same planet
ebay folks who came up with terms like "Quads" &/or "broken ladders." [I don't know any collector who collects special names like these] If you were to bring a "broken ladder" to the bourse at a big coin show most collectors (& dealers) will look at you pretty puzzled (& they'll tell you its FV).
Anyway, I like your 2 digit note. (And it is in pretty good shape considering you plucked it out of the wild). It would have appealed to me more if there was more symmetry (like 44442222) but its still a pretty nifty find.