That is an interesting find, yet another Boss design rip-off. Unfortunately, I cannot read German so I don't know what the description says. For some reason though, I get the thought that if it is German-made, could it be a Behringer? I am just wondering cause the LED placement is off to the side a bit some Behringer pedals. They were planning on putting their Boss-clone line in similar housings initially as well...
It�s not made in Germany but the circuit is very similiar to the DS-1 as far as I remember. Once I had one for testing on my wokbench. Not a bad unit at all.