Upright letterforms for drawings, as defined in the German industry standard, DIN.
Berthold Fototypes offered both DIN 17 and the inclined DIN 16. So did Letraset. Their DIN 17 came in two weights: 17m is lighter and also slightly wider and, unlike the other style, has a monocular ‘a’.
Digitally available from Scangraphic. Peter Wiegel did another digitization under the GDR name, TGL 0-17.