Great Britain 1993 Queen Elizabeth II Christmas 150th Anniversary of “A Christmas Carol” by Charles Dickens. 19p. new blue, yellow, magenta, salmon, bright emerald and grey-black. South West corner horizontal strip of three. Error, ‘Left hand pair completely Imperforate and third stamp partially so’. Superb unmounted mint condition. David Brandon Certificate No. 40,120 (2009). AN EXCEEDINGLY RARE AND IMPORTANT ERROR OF WHICH ONLY 3 PAIRS OF THE IMPERFORATE ERROR EXIST. AN EXHIBITION PIECE.