Canada 1937-38 $1 violet 'Chateau de Ramezay', VERTICAL PAIR ERROR IMPERFORATE HORZIONTALLY, with fresh original gum. Very fine appearance and a major King George VI rarity.
Only one pane of 50 existed, from which just 12 pairs, 6 strips of 3 and the unique plate block of 6 survive. Unmounted Mint. SG 367a