It must be Sans Serif Bold FLF Cond by Richard A. Ware - (Casady & Greene 1986-92)

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I found it using "Find my Font": http://www.findmyfont.com

Good catch Fivos! Seems to be it. I firstly thought it could have been Futura (Adobe or Linotype's version) squooshed. Darn close these ones, aren't they?

Although there are distinct differences in e.g. /B/J/S/C I agree that the normal weight of "Sans Serif" is really close to Futura ;)

many many thanks friend!!!