Looks like a variation of Twentieth Century (but the stroke ends on the 1, and the shape of the 5, are still off):
http://www.myfonts.com/fonts/mti/twentieth-century-mt/

The 5 is closer to something you'd see in Avant Garde (save for the pointed juncture of the bowl and vertical stroke):
http://www.myfonts.com/fonts/itc/avant-garde-gothic/

TR Avalon Sans Bold from FontShop has the 5 and 1 but some letterforms vary a tiny bit.

Twentieth Century Bold looks close, but there are still quite a few differences such as the curved back of the '6' which also has a smaller 'hole', in fact the enclosed sections of all characters should be smaller. The lower left hand flat section of the '3' should jut out slightly (I'll upload a few more images).

I couldn't find that font bojev. Is it similar to the following: http://www.fontsplace.com/tr-avalon-bold-free-font-download.html ?

Maybe what we're dealing with here is some knock-off of Futura (Spartan Heavy comes to mind, but it still isn't a perfect match--the 5, for instance).

In the phototypesetting era, there were often clones of famous typefaces that not only were given different names, but also "improved" on the details.

I think you may be right kthomps5. The manual contains a couple of other fonts which don't seem to be available in digital format. One of them looks almost identical to Garamont Amsterdam EF Medium Italic, save for a couple of very minor differences. The Garamont typeface was created in 2004 however, whereas the manual was written in 1946.
http://myfonts-wtf.s3.amazonaws.com/b2/b2c286799fbf380b09f0c00714980174....

The TR Avalon at fontsplace looks like a clone of Avant Garde, designed in 1970.
As for Spartan, this was produced in many variations from 1939 onwards by Bauer & Linotype, as a knockoff of Futura. Only two versions have been digitized, as Book and Heavy

TR Avalon is a older clone of Avant Garde as Don mentioned.