31b (20b) 1891 ½a on 2a vermilion Sun and Crown Mombasa Provisional, handstamp surcharge in dull violet and manuscript initials "A.D." in black, VARIETY - original face value not obliterated, unknown mint with only 4 used examples recorded per Minns / Krieger, very rare and undercatalogued, "Mombasa A" cds, signed Sismondo.
