Great Britain 1884 10s. Cobalt, Mint SG182Great Britain 1884 10 shilling Cobalt on white paper, SG182. A superb mint, perfectly centred example of this very rare stamp. The finest quality example in existence. The 10 shilling Cobalt is one of the most famous surface printed issues of Queen Victorias reign. It is so rare, it is known as the notorious missing stamp in most British Queen Victoria collections. Accompanied by a certificate of authenticity from the British Philatelic Association