“Persons will HOB NAILS BOOT! ARE FORBIDDEN IN THIS OFFICE [By Order of Postmaster].”

delightful effort made here at professional hand lettered sign making, jaunty !, etc, then ruined (or improved further) with an answer to the presumed "says who?” that looks like it was added when the sign was already on the wall by someone with a felt-tipped marker

https://mastodon.ozioso.online/@DorotheaLange/113356285657110012