Natal 1874 QV 1/- Revenue Ovptd on Letter to Scotland

1874 QV Revenue 1/- purple-brown ovptd POSTAGE (SG 63) used on envelope from Pietermaritzburg (crisp GPO cds 25 2 1874) to Scotland. The adhesive tied by superb full strike of numeral 1 cancel. Backstamped on arrival AP 6 74. Superb, scarce.