Neighborhood fingerprint station Fingerprints are your identification and protection during wartime – have the entire family take theirs now! : War Identification Bureau – CDVO
I’ve never heard of this before. Wikipedia and Google came up blank.
Did these really exist?
UPDATE: Solved by elandes on Twitter, who sent me this link, which explains:
In July 1940, the federal government ordered all citizens to report to their local post office to be fingerprinted and the FBI accumulated a large number of citizen fingerprints.
Ah, the Post Office. That makes sense now.