This china was left to me by mt Grandmother. My Mom told me they use to go to the movies here in Stamford,CT and everyone would get a piece. I have about 100 different pieces.
Any info would be much appreciated.
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 !!