The John Wilks British East Africa: I.B.E.A. Co. Overprints on Great Britain: 1890 1/2a. on 1d., 1a. on 2d. and 4a. on 5d. each handstamped "CANCELLED" (type GB14), very fine with gum and strong colours, the 1a. on 2d. lower marginal and showing break in second "N" of "ANNA". Produced as De La Rue or Inland Revenue reference specimens, it is thought that no more than twelve sets were created. (Image1)