Hi - and welcome
Your bowls are really interesting and look to be quite old. I don't know anything about Moravian/German pottery I'm afraid. The only thing I know about Moravians, is that in Manchester, where I originate from, there is a Moravian settlement. Its a lovely old place and an oasis of calm in what has become a very built up area surrounding it.
I'll be very interested to see if your bowls can be identified, or to find out more about Moravian pottery.