Hi Mart,
Well, basically I'm just interested in finding more information on Max, and/or his works.
Interestingly I came across a company today in Poland who is using his name... "ROSENBERG - PORZELLAN. "Our logo and name is a legally protected trademark Polish Patent Office decision. In spite of strong competition our Products find very big interest in Poland, as well as in EU, the US and Canada". Posted by the same person is also a company name, "Rosenberg-Kierat". Then in another source it says the company was founded by someone named Treadmill in 1980.
Very mysterious.
Do you know any experts in Polish porcelain (and its history) you could point me towards? I'm very interested in what happened to his company, and how it was formed. He died in 1934, and then of course the war came in 1939.
Thanks in advance Mart,
Tanya