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| Stamp Set | A full sheet of the 20 Fils on 20 Naye Paise overprint was found with the surcharge inverted. The inverted surcharge lies slightly to the right of the sheet so that the 20 impressed on the stamp actually is part of the “20 Fils” of the neighbouring stamp. According to Neil Donaldson the error is best seen on horizontal pairs of the stamp. The original finder kept 14 copies of the stamp and four copies were postally used. |
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| Type of Stamp | Definitive |
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| Web Cat. | 17a |
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| Stanley Cat. | 17ba |
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| Scotts Cat. | Not Listed |
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| Michel Cat. | 17K |
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| Country | Abu Dhabi |
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| Issue Date | 01-Oct-1966 |
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| Denomination | 20 Fils on 20 Naye Paise |
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| Colour | Ultramarine |
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| Perforation | 14 ˝ |
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| Quantity | 100 |
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| Sheet Size | 100 |
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| Description | The Second Definitive Issue – Inverted Overprint - 1966 |
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| Printer | Overprint and Surcharge was done by the Arabian Printing & Publishing House (Photogravure by Harrison & Sons of London). |