GE 211, 50 RM, Quatrefoil Wmk.

VF hinged, 1920 50-mark posthorn issue with quatrefoil watermark. Designed to be used for revenue stamps, quatrefoil watermarked paper was used for emergency purposes to print a few stamps during the transition from diamond to network watermark paper. Scarce mint and rare used. Showing watermark with shapes more like clover leaves than diamonds.