What font do they use on Haynes Manuals?

An ongoing Photoshop project is to mock up a Haynes manual (finished article is here), but I've had hell and all trouble finding the right font to mimic the old-style Haynes books.

No amount of Googling came up with the answer, but to help anyone else doing the same thing, the answer is 'Alte Haas Grotesk' which I found on DaFont.com.  It's not exact (slightly more rounded) but it's pretty damn close.

So now you know.