SG 95bw/ACSC 81Ba(1)fx2:
KGV Small multiple wmk 13½ x 12½. 1d green die 2 vertical COIL pair with WMK INVERTED. Less than a handful of such die 2 coil pairs exist. The upper stamp is mint very very lightly hinged, the lower is mint unhinged with coil join. DRURY CERTIFICATE. A RARITY.