"Pulp" magazines from the 1930's.
Very risque. And these are just the ones I decided to post. There were far worse ones. Wonder how this stuff made it past the censors back then?
(I don't think it was considered "porn." You could probably buy it anywhere. You know guys beat off to this. Hell, I'm thinking about beating off to the blonde on the cover of the first one. By the way, excuse me for a sec... 
)