I can't tell from these photos but the same design was used for dimes in 1861. If the coin is the same diameter as a modern
Roosevelt dime then you know it is a dime, not a
Half Dime. Please check and let us know!
The USA 5-cent coins were originally made of silver, starting in 1794. They were exactly half the weight and half the silver content of the 10-cent dimes. The first nickel-alloy 5-cent coins were issued in 1866 and became popular, with the term "nickel" becoming the common name for the coin. The silver half-dime pieces were phased out with 1873 being the last year of issue.