Spink, Auction 18052, Lot 1052 (x) East African Currency Board, 5 shillings, Nairobi, 1 June 1939, prefix S/2, orange brown, also 10 shillings, Nairobi, 1 June 1939, prefix K/9, dark green, blue and pink, everse green, lion at centre, both George VI at right, value at left, at centre and at each corner, signatures of Bottomley, Kershaw and Boyd,(Pick 26Ab, 26B, TBB B217c3, 21...