I found a Royal Dalton Octopus 16 inch bowl, made 1947 to 1949 for $9. None on Ebay, only sold price I could find was a bidding war for $300 shipped. I sort through lots of junk but finds like this make it worth it.
Great find! Here is a screenshot from WorthPoint that shows the four sold plates/chargers in their records. Your color seems to have commanded the highest price. Congrats!