Rama Gothic Condensed Heavy  Sugerida por ToxicHippo 
Helvetica Ultra Compressed  Sugerida por Heron2001 

The little "40 cents" in the corner makes me think this was printed in the days of actual press printing - so not digital fonts then...there might be a similar/identical one around nowadays though.

I do not know... "COMMUNIST MANIFESTO FONT"... PLEASE.

Try Impact or Haettenschweiler.
But they are both too thick.
http://www.myfonts.com/fonts/ascender/impact/

love it. hope it gets found!

http://www.myfonts.com/fonts/tilde/aurora/condensed/
Many lower case letters are very similar in this one, but that's as far as it gets...I really think the font in the pic is not a digital font.

This is pretty close.

alannoise, your best bet is to use what Heron2001 suggested, as I said before, there is probably no font.
@Heron2001, I think the Helvetica is closer, no?

It is Helvetica - but it is Ultra Compressed and probably should be condensed a bit more manually. Helvetica came to the States in the late 1950s - as hot metal. It was also a font that when converted to digital, every manufacturer made their own version... I was Alphatype - so ours was called Claro - can we find the exact Helvetica that was used... probably not... unless you go to the hot metal shop that was left up as a museum in Manhattan (or Maine... there is one there too!)

FYI - it was probably from typositor... and that means many more Helvetica drawings... VGC, Chicago, etc.