Among known variety are 'C' on 7 Studs with one Stud blank or 'C' or 'F' on 8 Studs. Nothing are given 'C' and Mold Pip on the Long Side.
Known variations have 'C' on 7 Studs with one Stud blank or 'C' or 'F' on 8 Studs. Nothing printed underneath, and with the Mold Pip is on the Long Side.