NEWFOUNDLAND SG221a 1.50 on 1 Dornier DO-X error SURCHARGE INVERTED BLOCK OF 4

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£54,740.00

SKU: M250353

Out of stock

1932 (19 May) 1.50 Dollar on 1 Dollar deep blue Dornier DO-X error SURCHARGE INVERTED a wonderful BLOCK OF 4 showing the complete setting brilliant unmounted o.g. A world class airmail rarity superb in every respect. Believed to be one of just three or four surviving intact blocks from the ten that originally received an inverted surcharge. Ex Harmer 18/11/98 lot 146 (sold for 27600 pounds) with Bolaffi (1975) and BPA (1998) certs.Stanley Gibbons catalogue is 84000 pounds as mounted mint singles and Unitrade (2018) 240000 Canadian Dollars approx (1st Oct 2022) 162500 pounds.Ex Stanley Gibbons investment portfolio.