3 7/8" X 3" (95mm X 76mm)

No markings (note British pinhole, found in New Zealand)

{Canadian Porcelain}

Picture courtesy Barrett Nicpon

3 7/8" X 3" (95mm X 76mm)

No markings (British pinhole of insulator to the left, found in New Zealand)

{Canadian Porcelain}

Picture courtesy Barrett Nicpon