Ignore the words "front" and "back"

Europa Grotesk Bold  Vorgeschlagen von Heron2001 

It's close - the G and 4 are stompers...

Also close is California Grotesk http://myfonts.us/td-oLHMXT which is what I thought it was when I first looked at it. If no one else can figure it out, maybe one of these will work in a pinch.