Dianthus pattern Wedgwood & Co china platter or tray, backstamp dates this to 1880s or 1890s vintage. It's heavy, and huge! Measures about 15 1/2" x 11 1/4" across the rim.
This has worn gold trim, crazing and scratching, with browned discoloration from age and use. No chips or cracks, just a beautiful old piece loved and used over a hundred years.