The coin in question is a 1940 Mercury Dime, minted at the Denver mint (indicated by the "D" mint mark). This classic United States coin features the iconic design of Liberty wearing a winged phrygian cap, symbolizing freedom and liberty, along with the word "LIBERTY" inscribed beside her. The reverse side of the coin showcases the image of a fasces and an olive branch, emblematic of strength and peace, accompanied by the inscriptions "UNITED STATES OF AMERICA" and "E PLURIBUS UNUM." This specific dime is made of silver, weighing 2.5 grams with a diameter of 17.8 mm. Its mintage stands at 21,198,000 pieces, making it relatively common compared to other dates in the Mercury Dime series, which were struck from 1916 to 1945. Overall, the 1940 Denver Mint Mercury Dime offers collectors a piece of American history and is valued for both its silver content and its aesthetic appeal. Depending on its condition and grading, the value of this coin can vary significantly in the numismatic market.