Imprint and plate number are the same as Bureau Imprint I. Used on Playing Card stamp #RF3. Initial plate 9325

“XX CENT PROPRIETARY PLATE #” Used on plates of the 1919 series.

“XX CENT DOCUMENTARY PLAT NO. #” Used on 80¢ plates of the 1917 series.

“xx CENT DOCUMENTARY STAMP, PL. #” Used on 3¢ and 20¢ plates of the 1917 Series.