VERY FINE. ONE OF ONLY TWO RECORDED EXAMPLES OF THE 1876 6-PENCE BLUE GREEN WITH INVERTED "S" AND THE ONLY ONE CURRENTLY AVAILABLE TO COLLECTORS.
The other known example has been tied up in a trust for several decades, and it could be many more years (if ever) that the stamp is offered to the public.
Ex Melat and Prappas. Illustrated in Linn's Philatelic Gems 5. With 1981 B.P.A. certificate. SG £13,000