It's a "FLIK FLAK", dated back to approx. 1971. Made by the German company Aisch & Melchers. I have also seen this machine refereed to as a Wurlitzer. I know that wall-mounted entertainment machines were branded Wurlitzer; but I do not have actual knowledge about this. Please feel free to enlighten me :-)
I got quite a few wall-mounted entertainment machines; and they are all great. But this one is something real special.
Technically, I believe it is just as complicated & filled with features as the big cousins pinball machines from Bally, Goetlieb, etc. at the time.
If any of you know of other wall mounted pinball machines, I'd love to hear about it !