on 2 annas, initialled "A.B.", used with "MOMBASA/A/MR 3/91" single circle datestamp, from the left of the sheet; small corner crease. Clear R.P.S. Certificate (1930). S.G. 23, £700. Photo" /> used <I>"½ Anna"</I> on 2 annas, initialled<I> "A.B."</I>, used with "MOMBASA/A/MR 3/91" single circle datestamp, from the left of the sheet; small corner crease. Clear R.P.S. Certificate (1930). S.G. 23, £700. Photo | Christie's