Thank you. That’s very helpful. Any idea where I could sell the set?
I also got a white set royal princess. Any idea about that one. Would like to sell them both. Thanx.

https://www.cesky.porcelan.cz/en/home

Here is the company that made your set !! The mark above the name has Bohemia which I think is part of Czech Republic !! So either can be used in the marks !! Czechoslovakia was eliminated in 1992 and divided into two countries with Slovakia separate !!