3 5/8" X 5 3/4" (91mm X 145mm)

(skirt ink stamp)

{Made by KPM of Berlin}

Picture courtesy Bob Berry

3 3/8" X 5 5/8" (85mm X 139mm)

(ear inkstamp)

{Gebruder_Kuhnlenz}

Picture courtesy Bob Scafe

3 1/2" X 5 5/8" (89mm X 139mm)

(dome ink stamp)

{Rosenthal}

Picture courtesy Bob Scafe

3 1/2" X 5 5/8" (89mm X 139mm)

(skirt incuse) T. D.

                    Schomburg

                   1880

{Schomburg}

Picture courtesy Bob Berry

3 5/8" X 5 5/8" (89mm X 141mm)

(skirt ink stamp)

{Made by KPM of Berlin}

Picture courtesy Bob Scafe