3 1/4" X 4 3/8" (82mm X 108mm)

No markings

Picture courtesy Bob Berry

3 1/8" X 41/4" (79mm X 106mm)

No markings (formerly CD 170.1)

Picture courtesy Bob Berry

3 1/8" X 3 7/8" (79mm X 98mm)

No markings (formerly CD 170.1)

Picture courtesy Dario Dimare