Queen Margrethe II issued with INVERTED OVERPRINT. Mint never hinged.
Other suggestions
1895 Orange Free State GBP 470.00
1899 Danish West Indies GBP 1,197.00
1873 Danish West Indies GBP 641.00
1905 Danish West Indies GBP 192.00
1902 Iceland GBP 214.00
1955 Greenland GBP 1,026.00
1873 Denmark GBP 2,051.00
1875 Denmark GBP 342.00
1903 Iceland GBP 1,709.00
1873 Danish West Indies GBP 470.00
1902 Danish West Indies GBP 1,197.00
1880 Faroe Islands GBP 641.00