Hello,
I can't believe no one asked that before.
Is it so obvious ? Anyway... I just can't identify that typeface.

You will find no matching font, but P22 Underground comes closest.
This is the closet i got... Avenir next, Gotham M, Bliss R.
http://img69.imageshack.us/img69/157/keepcalmzi1.jpg
This typeface reminds me a lot of Caslon's egyptian, by the way.
dr
You can buy reproductions for just a couple quid or so at http://www.barterbooks.co.uk/ if you dare use their website! I did anyway, much cheaper than the other places that sell it, not silkscreened but who cares you just put it in a cheapy frame! Or just recreate yourselves ofcourse, I'm lazy.
K-Type - Keep Calm
http://www.k-type.com/?p=2199

I would like to use the official Typophile logo but until then...

And up on the Keep Calm website...
http://www.keepcalm-o-matic.co.uk/p/keep-calm-and-letter-on/
:)
n.
Captured from commoncrawl.org on 26 Apr 2015. original URL