I saw one of those manual-hand-cranked blower's at a flea market , it was old and I couldn't figure out what the hell it was used for now I know it came out of

I saw one of those manual-hand-cranked blower's at a flea market , it was old and I couldn't figure out what the hell it was used for now I know it came out of a 50's bomb shelter, the guy selling it didn't know what it was either.