3" X 3 5/8" (74mm X 89mm)

(skirt inkstamp) NGK

                       1962

                     MADE IN JAPAN

{NGK Porcelain}

Picture courtesy Bob Berry

3" X 3 5/8" (74mm X 89mm)

(skirt ink stamp)   

                             MADE IN JAPAN

{NGK Porcelain}

Picture courtesy Bob Scafe

2 7/8" X 3 1/2" (73mm X 86mm)

(skirt ink stamp)     

                             1948

                             MADE IN JAPAN

{OTK}

Picture courtesy Bob Scafe

3 1/4" X 3 5/8" (80mm X 89mm)

(skirt ink stamp)     

                             MADE IN JAPAN

{Maker unknown}

Picture courtesy Bob Scafe

3 1/4" X 3 5/8" (80mm X 89mm)

(skirt ink stamp)     

                             MADE IN JAPAN

{Maker unknown}

Picture courtesy Bob Berry