[palmer]

"Although they were issued until 1969, they were last printed in 1945"

https://www.moneyfactory.gov/uscurrency/denomsabove100.html

Also: "These notes are legal tender and may be found in circulation today;" (but any collector will pay above face for any such note)

[SaveFerris]

Thank you. I never had “big money” so there must be others that had them. I had some money (back then) and moved it in and out of my bank and brokers (electronically). But if I wanted cash, I could go to the counter and pretty easily find a few even $500 bills they had on hand at just about any of the branches I used.