3 5/8" X 4 1/4" (91mm X 108mm)

No markings

Picture courtesy Bob Berry

3 5/8" X 4 1/4" (91mm X 108mm)

(skirt incuse) G.P. Co.

{General Porcelain}

Picture courtesy Elton Gish

3 5/8" X 4 1/4" (91mm X 108mm)

(skirt incuse) G.P. Co.

{General Porcelain}

Picture courtesy Elton Gish