From your reference: > (If your question is more of a technical one: These signs weren't all individually hand-lettered. A professional lettering artist makes

From your reference: > (If your question is more of a technical one: These signs weren't all individually hand-lettered. A professional lettering artist makes one copy, then the artwork is photographed and turned into a plate for silkscreening or lithography.) Holy crap, was this so common they had it made produced like the baby on board signs? :(