RB/GM
Not in Marler: Type R30 stamp with a straight edge at the bottom and a large guide dot under the left numeral box in the bottom margin.
Plate Position: 133UL91
Marler Type:
R30
RB/GM
In Marler's collection with the plate position provided, but not listed in his book. It is possible that the top line in the upper left has been retouched at the right.