Mafeking Siege 1900 SG15, 1/- on 6d - Only 240 Ovptd - Rare

1900 1/- on 6d purple on rose-red of British Bechuanaland, Type 2 Overprint (SG 15). VF/U example with Mafeking cds. A key stamp - only 240 ovptd - the lowest printing of any of the Mafeking issues! Rare stamp. Photo-cert: BPA. (cv£850). See clickable image of certificate below.