5 1/2" X 4 1/4" (139mm X 108mm)

(skirt inkstamp) 4 0

                         CANADA

Note - Found in Australia

{Canadian Ohio Brass}

Picture courtesy Barrett Nicpon

5 1/2" X 4 1/4" (139mm X 108mm)

(skirt incuse) NP / 72

(inside saddle groove ink) 3D

Note - from factory with no radio treatment added

{National Porcelain}

Picture courtesy Barrett Nicpon