Rosenthal expanded his company in 1897, when he bought another German factory in Kronach. The mark you describe was used on pieces made there between 1933 and 1945. Your dish, while not an expensive piece of Rosenthal porcelain, is certainly worth more than you paid. The Rosenthal firm is still in business making china dinnerware, giftware, figurines, glass and cutlery. Current prices are recorded from antique shows, flea markets, sales and auctions throughout the United States.
Prices vary in different locations because of local economic conditions.
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