Johnson Bros Old Britain Castle Rare Service 18 Dishes Semi Porcelain Brown. The description of this item has been automatically translated. JOHNSON BROS OLD BRITAIN CASTLE RARE SERVICE 18 SEMI BROWN PORCELAIN PLATES. The 6 dinner plates measure 25cm in diameter, the 6 soup plates measure 24.5cm in diameter and the 6 dessert plates measure 20cm in diameter. We will answer your questions as soon as possible.