A bigger sample and/or origin details might help (a lot)...

Here is a link to the online graphic I found.

http://www.alainvonck.com/shanghai.html

Sample is too small even with resolution enlargement software.

Apologies. The online graphic is all I have to go by.

Thanks for the input. Try some OCR first, OCR-B or OCR-F look not so far...

It's not DIN--thanks to the full sample, I can see that the numerals don't match (specifically, the 6). Same goes for all flavors of OCR.

The 4 has a gap and a high waist, the top of the 6 is rounded over, the 1 has a sharply angled downstroke, and the Q tail is a straight line at about a 45 degree angle.

Linefeed is the closest I found, but the 6 and the Q aren't right:
http://www.myfonts.com/fonts/typodermic/linefeed/

sorry, double post

Fugue Mono
http://www.radimpesko.com/fonts/fugue