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

1874 QV Revenue 1/- purple-brown ovptd POSTAGE (SG 63) used on envelope from Pietermaritzburg (GPO cds 2 01 - date numerals transposed) to England. The adhesive a wing margin example, the wing margin applied over top of cover. Tied by numeral 1 cancel. Backstamped on arrival NO 20 74. A tad less than fresh. F, scarce.