As documented by Somod and as the accepted information on of these seldom-encountered issues, the below cited examples housed in the Danish Royal Collection have been used for comparison since they have been in the possession of Danish officials since the date of issuance.
"Governor of the Danish West Indies Peder Hansen buys in the US at d'herrer Finlay & Co. $ 7,700, - in small coins consisting of half and quarter dollars and 10, 5 and 1 cents. Of this, before September 28, 1850, he sent a nominal $ 1,140 in circulation, of which the half and a quarter dollars are counter-marked. On 28 September 1850, the Government of the Caribbean submits to the Colonial Central Board of Copenhagen two coins with a registered royal name digit. In 1856 the coins are in the colonial office. (National Archives, Copenhagen, West Indian Journal 1850 no. 1006 and 1856 no. 1033.)"
The two coins in the Danish Royal Collection are:
1) USA 1/2 dollar 1849
2) USA 1/4 dollar 1849
Ex: Brunn Rasumssen (2/78) Lot # 652.
Ex: Representative Chr. Helming Collection (Copenhagen 4/52) Lot # 76.
Ex: O. Blom Carlsen Collection (Copenhagen 1938) Lot # 67.
Ex: L. E. Bruun Collection Duplicates (Copenhagen 1925) Lot # 4374.
Ex: C. Bech, Slagelse Collection (Copenhagen 1906) Lot # 1423.
Ex: Alfred Benzon, died 1884, Collection (Copenhagen 1887) Lot # 3305.
Plated in the Numismatist Vol. XLI No. 1 January 1928 "The Coinage of the Danish West Indies, or Virgin Islands" by O.B. Carlsen, Chicago Ill. Pg. 10 No. 8 (plate Coin).
Estimate: $16000.00- $22000.00