SG 206a

Rhodesia 1913-1922 Admirals. 1½d bistre-brown. Variety, ‘Imperforate between (horizontal pair)’. Superb unmounted mint, centred slightly to the top. A few short perfs. British Philatelic Association Certificate (1994). THIS IS CONSIDERED TO BE THE MOST IMPORTANT ADMIRAL IMPERFORATE ERROR AND IS THE ONLY RECORDED EXAMPLE. UNIQUE THUS. EXCEPTIONAL.