Lot 718, 1900 British Bechuanaland six pence purple with 1 shilling Mafeking surcharge, used

Lot 718, 1900 British Bechuanaland six pence purple used with 1 shilling Mafeking surchargeLot 718 Cape of Good Hope #176 1900 1sh on 6d purple Mafeking Siege Surcharge, used, postmarked Mafeking CGH dated MAY.10.1900. Very fine and accompanied by a 2007 Sergio Sismondo certificate. Scott CV$900.
2007 Sergio Sismondo certificate