I assure you that it's a standard bike that would be mostly bought at a supermarket or department store. Think HEB in the US. That would be where most bicycles would be purchased rather than a bike shop.

Germans like durable goods and stuff that is build to last and that bike is solid.

I'd see at least 10 a day in Frankfurt which and they have nothing to do with the military.

Enjoy it, I would have simply picked up a dyno powered wheel shipped to your front door rather than deal with the hassle. Of batteries.