3 1/8" X 4 1/8" (79mm X 104mm)

No markings

{found in the Ukraine}

Picture courtesy Tom Katonak

3 3/8" X 4 3/8" (88mm X 110mm)

No markings

Picture courtesy Dan Wagner

3" X 4" (76mm X 101mm)

No markings

{found in the Ukraine}

Picture courtesy Don Mecklenborg

3 1/4" X 4 1/8" (82mm X 104mm)

No markings

Picture courtesy Dan Wagner

3 1/8" X 4 3/8" (79mm X 110mm)

No markings

{found in the Ukraine}

Picture courtesy Tom Katonak