1894 De La Rue Minerva Head AFRICA Essay: Imperforate example taken in 2½d duty in carmine-rose & olive-green on gummed unwatermarked paper. Superb UM, most attractive, scarce. See additional image below.
De La Rue proposed this keyplate design to the Cape, OFS, Natal & Transvaal with the intention of making stamp production more economical. Agreement could not be reached with the Transvaal and OFS.