; or (B) World War II. (d) Duplicate medals Under regulations that the Secretary may prescribe, the Secretary may strike and sell duplicates in bronze of the gold medal struck under this section, at a price sufficient to cover the cost of the medals, including the cost of labor, materials, dies, use of machinery, and overhead expenses. 5. Status of medal (a) National medal The gold medal struck under section 4 shall be a national medal for the purposes of chapter 51 of title 31, Unites States Code. (b) Numismatic items For the purposes of section 5134 of title 31, United States Code, all medals struck under section 4 shall be considered to be numismatic items.