GB QV SG7 1d Red Brown From Black Plate 10 LH Unmounted Mint Williams cert Rare

A super and beautiful SG 7 AS69 Penny Red Brown from the scarce Black plate 10. Unmounted mint example. Comes with a Mike Williams certificate when it was in a block of 4. Highly desirable example. High SG cat value. An extraordinary philatelic rarity. A super addition to your collection.