"2d." Surcharges 1888 (Sept-Oct): 2 d. on 3 d. ultramarine, surcharge Type 6c with variety "Curved Foot" in '2' of surcharge, a fine used example cancelled by "8" numeral obliterator of Boshof. Rare. Signed W. Houtzamer. Cert. RPSL (1917) Gi = £ 500.