After a cursory search, the only one I found with such a |4| and overall similar construction (albeit less neutral), is Hybrea: http://www.myfonts.com/fonts/typodermic/hybrea/
Closer looks here and here
Looks custom to me or even designed by Max Bill himself. Makes me thinking (a lot) to some modified (manually rounded, /4 redrawn...) Eurostile Extended. Another point giving credit to the Eurostile track is it's actually Junghans logotype font (and almost everywhere on their website)
Some more in the same vein: Eurostile Candy, Alban (another rounded Eurostile), Reversal (another Eurostile clone), Saturn (one more Eurostile), Reaction, Phantom, Stak, Geometry Soft Pro Light C, Miedinger, Phat

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