11th-13th century. Single scale or independent plate (distinct from lamellar armor) from a “coat of plates” riveted to a heavy leather hauberk. See Arms and Armour of the Crusading Era, #240 for further related examples. Single rectangular plate, 2 1/8” x 1 3/8,” trapezoidal with rounded corners. One rivet and shank of the other remaining. Very sound excavated condition. The armor of the common soldier, more economical than mail armor and representing a step in the evolution of plate armor.