The John Wilks British East Africa: 1891 Mombasa Provisionals: "1/2 Anna" handstamped on 2a. vermilion, unused, trivial mark at left otherwise fine and most attractive. One of only six recorded unused examples. Ex Krieger. S.G. 20, cat. £11,000. Photo. (Image1)

The John Wilks British East Africa: 1891 Mombasa Provisionals: "1/2 Anna" in manuscript on 2a. vermilion with original face value not obliterated, initialled "A.D." by Chief Accountant Andrew Dick, unusually cancelled by Aden "MA 9/91" squared circle and crossed by blue pencil line as noted on mail from the C.M.S. Mission at Freretown. S.G. 22, cat. £4,750. A rare stamp, with no unused examples recorded. Photo. (Image1)

The John Wilks British East Africa: 1891 Mombasa Provisionals: "1 Anna" in manuscript, 'heavy' surcharge, on 4a. brown, initialled "A.B." by Company Cashier Archibald Brown, large part original gum, small mark at foot otherwise fine and rare. Ex Gibralter and Krieger. B.P.A. certificate (2000). Only five unused examples have been recorded in this hand. S.G. 26, cat. £10,000. Photo. (Image1)

The John Wilks British East Africa: 1891 Mombasa Provisionals: "1 Anna" in manuscript, 'light' surcharge, on 4a. brown, initialled "A.B." by Company Cashier Archibald Brown, horizontal pair tied to piece by "MR 15/91" c.d..s's, this the earliest known date of usage, part lifted for inspection, fine. Only one other pair is recorded, any multiple of the Mombasa Provisionals being rare. Ex Pirie, Pennycuick, Dunstan and Minns. S.G. 26, cat. £4,000+. Photo. (Image1)