The listing, 1953 Roosevelt S dime (JS front) has ended.
Auction for one 1953 "S" Roosevelt Dime, silver tarnish and all! (LOL)
The coin is 90% silver.
I found this information about the dime's design online:
The Roosevelt Silver Dime was released to the public on January 30th, 1946, which would have been Franklin D. Roosevelt's 64th Birthday.
The dime was chosen for honoring Roosevelt in large part because of his commitment to the National Foundation for Infant Paralysis, which was popularly known as the March of Dimes because of Roosevelt's encouragement that Americans send in one dime to fund the foundation.
The Roosevelt Silver Dime was designed by mint engraver John R. Sinnock. The front of the coin features a profile view of Roosevelt, while the reverse features a torch, olive branch, and oak branch, which represent Liberty, Peace, and Victory respectively. The design caused some controversy when it was released, as anti-communist sentiment led to speculation that the initials JS that appeared under Roosevelt's neck were a tribute to Joseph Stalin. In reality, they simply denoted that the coin had been designed by John Sinnock.