3 3/8" X 5" (86mm X 129mm)

(dome inkstamp) RIG

{RIG}

Picture courtesy Bob Scafe

3 3/8" X 5 1/8" (86mm X 129mm)

(dome inkstamp)

                            SELB-BAVARIA

{Rosenthal}

Picture courtesy Bob Scafe

3 1/2" X 5" (89mm X 126mm)

(dome inkstamp)

{Stockhardt & Schmidt}

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Picture courtesy Bob Scafe