Best way is just look up the pattern on ebay !! That will tell what people are actually paying !! If at all !! China of any kind is in a slump except for very high end pieces !! Even it is slow !! China like yours that was given as premiums is usually plentiful and not expensive at all !!

Thank you s much for your help marthahill =-0) Now to try to discover what it’s worth! I suppose I can contact them direct.

http://www.sebringohiohistoricalsociety.org/RoyalChina.html

Here is a short history on the company !! You can find your mark at the bottom of the page !!