Great Britain 1840 1d grey-black Plate 9 cover, SG3.
A very fine used large four margin pair lettered "KI-KJ", tied to a clean entire letter by black Maltese Crosses. Addressed to Cambridge and backstamped with a Brackley (Norths), London transit and Cambridge arrival circular date stamp for "JY.12/13.1841".
A scarce multiple of the world's first postage stamp, especially in the worn plate grey-black shade.
A most attractive penny black cover.
