GB SOUTH AFRICA Military *ZULU WARS* Unpaid Cover 1880 Charge Mark 6d (9d) MARITIME Transit London Agent M12e

RARE USAGE. Note super strike 9d Charge Mark applied INVERTED to represent 6d (?). Some faults as usual but overall VG/Fine for an item of this type & period. Please look at all the scans to help form your own opinion.