WALL PLATE COW, HEINEN DELFTS BLAUW, WANDBORD KOE, 31CMA Delft blue wall plate with a curious cow on it who is looking at you directly. A Delft blue wall plate with a curious cow on it who is looking at you directly. A wall plate is one of the oldest Delft blue products around, and over the past few years this form of wall decoration became increasingly popular. This ceramic wall plate is of a high quality and thanks to the little hook on the back of the plate, it is very easy to attach it to the wall.