. . . "The third surface mirror reflector coating (established over the central or EC-active region of the glass third surface of the rear substrate) may comprise a metallic coating or layer or a metal oxide/metal/metal oxide coating, such as a stack of materials or layers, such as, for example, a layer of ITO (such as about 500 angstroms thick), a layer of metal (such as a layer of silver or aluminum th" . . .