The John Wilks British East Africa: 1891 Mombasa Provisionals: "1/2 Anna" handstamped on 2a. vermilion, initialled "A.D." by Chief Accountant Andrew Dick, used with "MR 30/91" c.d.s. and crossed by blue pencil line as noted on mail from the C.M.S. Mission at Freretown, pressed corner crease otherwise fine. S.G. 20, cat. £1,100. Photo. (Image1)

The John Wilks British East Africa: 1891 Mombasa Provisionals: "1/2 Anna" handstamped on 2a. vermilion, initialled "A.D." by Chief Accountant Andrew Dick, late use with "MY 4(?)" c.d.s., fine. S.G. 20, cat. £1,100. Photo. (Image1)

The John Wilks British East Africa: 1891 Mombasa Provisionals: "1/2 Anna" handstamped on 2a. vermilion, initialled "A.D." by Chief Accountant Andrew Dick, used on piece with 2a., 8a. grey, 1r. carmine pair and single, tied by Mombasa "A/MY 27/91" c.d.s.'s and crossed by blue pencil line as noted on mail from the C.M.S. Mission at Freretown. Ex Danson (Robson Lowe May 4 1971, lot 1070) but the surcharge offered 'as-is'. Photo. (Image1)

The John Wilks British East Africa: 1891 Mombasa Provisionals: "1/2 Anna" handstamped on 2a. vermilion, the original face value not obliterated due to low surcharge struck directly over value tablet, initialled "A.D." by Chief Accountant Andrew Dick, latest recorded date with "JY 5/92" squared circle and blue pencil line as noted on mail from the C.M.S. Mission at Freretown, fine. One of only five recorded examples, illustrated in "British East Africa: The Stamps and Postal Stationery" by Minns (ed. Krieger, 2006), p. 44. S.G. 20b, cat. £3,750. Photo. (Image1)

The John Wilks British East Africa: 1891 Mombasa Provisionals: "1 Anna" handstamped on 4a. brown, initialled "A.B." by Company Cashier Archibald Brown, fine used. R.P.S. certificate (1933). S.G. 21, cat. £2,250. Photo. (Image1)

The John Wilks British East Africa: 1891 Mombasa Provisionals: "1/2 Anna" in manuscript on 2a. vermilion, initialled "A.B." by Company Cashier Archibald Brown, used with Lamu "AP 28/91" c.d.s's, the latest recorded date. Ex Isleham. Brandon certificate (1987) S.G. 23, cat. £1,100. Photo. (Image1)

The John Wilks British East Africa: 1891 Mombasa Provisionals: "1/2 Anna" in manuscript on 2a. vermilion, initialled "A.B." by Company Cashier Archibald Brown, used with Lamu "AP 7/91" c.d.s's, mainly fine. Ex Kiesel. R.P.S. certificate (2002) S.G. 23, cat. £1,100. Photo. (Image1)

The John Wilks British East Africa: 1891 Mombasa Provisionals: "1/2 Anna" in manuscript on 2a. vermilion, initialled "A.B." by Company Cashier Archibald Brown, used with Lamu "MR 3/91" c.d.s, the earliest recorded date, pressed corner crease otherwise fine. S.G. 23, cat. £1,100. Photo. (Image1)

The John Wilks British East Africa: 1891 Mombasa Provisionals: "1/2 Annas" in manuscript error on 2a. vermilion, initialled "A.B." by Company Cashier Archibald Brown, used with "MR 30/91" c.d.s's. S.G. 23a, cat. £1,200. Photo. (Image1)

The John Wilks British East Africa: 1891 Mombasa Provisionals: "1/2 Anna" in manuscript on 3a. black on dull red, initialled "A.B." by Company Cashier Archibald Brown, used with "JY 2/91" c.d.s. B.P.A. certificate (1966). S.G. 24, cat. £2,250. Photo. (Image1)

The John Wilks British East Africa: 1891 Mombasa Provisionals: "1/2 Anna" in manuscript on 3a. black on dull red, initialled "A.B." by Company Cashier Archibald Brown, lightly cancelled, some unimportant toning on reverse of perfs. otherwise fine. B.P.A. certificate (1947). S.G. 24, cat. £2,250. Photo. (Image1)

The John Wilks British East Africa: 1891 Mombasa Provisionals: "1 Anna" in manuscript on 3a. black on dull red, initialled "V.H.M." by bank manager Victor H. Mackenzie, used with "OC 15/94" c.d.s., apparently removed from a 'Macallister' cover. S.G. 25, cat. £1,400. Photo. (Image1)

The John Wilks British East Africa: 1891 Mombasa Provisionals: "1 Anna" in manuscript on 4a. brown, initialled "A.B." by Company Cashier Archibald Brown, used with "JY 2/91" c.d.s. B.P.A. certificate (1982) and letter from John Minns (2013) suggesting the surcharge to be in Brown's own hand rather than that of a clerk. S.G. 26, cat. £2,000+. 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, used with Lamu "AP 19/91" c.d.s., fine. B.P.A. certificate (1966). S.G. 26, cat. £2,000. 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, used on piece with 2a. vermilion (trivial fault) to pay 3a. rate, tied by Lamu "AP 1/91" c.d.s's, the 2a. affixed inverted as noted on the 'Colombo Cover' (see lot 204). Ex Minns. Manuscript note on reverse notes "ex Charles Carrie Collection". R.P.S. certificate (1973). S.G. 6, 26. Photo. (Image1)