Monotype Sans Serif
As shown in American Metal Typefaces of the Twentieth Century, by Mac McGrew, Oak Knoll Press, 1993.
The blatant copying of other designs was common in metal type, but Monotype’s Sans Serif by Sol Hess in 1930–33 took it to another level, mimicking several typefaces at once. It started as a Kabel knockoff, but through the later addition of alternates (novel at the time) it could emulate other popular Geometric sans serifs of the day, such as Futura and Bernhard Gothic. The generic name was therefore quite appropriate.