1908 SG35a.
2 1/2d on 4d Brown and blue. 'SURCHARGE DOUBLE'.
Superb mint in se-tenant pair with normal.
David Brandon and Royal Certificates.
THE ONLY SE-TENANT PAIR IN PRIVATE HANDS (the other pair being in the Royal Collection).
THE HIGHLY FAMOUS AND MOST IMPORTANT PHILATELIC ITEM OF CAYMAN ISLANDS!
Ex: Nissen, Prappas and Gibralter.