You had to get a leaflet out. No problem: just slip the old stencil into the typewriter and, with a trusty bottle of correction fluid (or nail polish), in, say, half an hour you had yourself the makings of mass communication. If you were feeling flush, maybe you'd spring for an electro-stencil!
Anyway, that done it was time to strap the stencil onto the barrel of the old mimeograph and then print away -- sheet after sheet after sheet . . . until the stencil exploded or the machine overinked . . .
Next day, you blanketed the city with the document . . . and if you were graced with a little foresight that particular day, you kept one copy of your creation in a file.