These sets are from the stock of the American Banknote Company. The item "Curacao Airmail Set blocks of 4 overprinted Specimen Mint never Hinged" is in sale since Sunday, July 26, 2020. This item is in the category "Stamps\Europe\Netherlands & Colonies".
The seller is "carloskleef" and is located in Middelburg. This item can be shipped worldwide.