on 4 annas, initialled "A.B.", corner pair, used with 1890-95 ½a. dull brown, 4a. yellow-brown and 1r. carmine, tied by "MOMBASA/A/JY 2/91" single circle datestamps; front somewhat crumpled but very rare. S.G. 26, £2,000. Photo" /> on piece 1891 (2 Jul.), cover front from Mombasa to Glasgow, bearing<I> "1 Anna"</I> on 4 annas, initialled<I> "A.B."</I>, corner pair, used with 1890-95 ½a. dull brown, 4a. yellow-brown and 1r. carmine, tied by "MOMBASA/A/JY 2/91" single circle datestamps; front somewhat crumpled but very rare. S.G. 26, £2,000. Photo | Christie's