Type :- Roosevelt Dime
Year :- 1959
Mint :- No Mint mark,Philadelphia
Mintage :- 85,780,000
Design by :- John Sinnock
Silver Content :- 90 %
With just 85 million 1959 Franklin D. Roosevelt dimes minted they are the rarest of the 90% silver dimes issued this year. 1.14 million proofs were issued this year, The Letter J S under Roosevelts neck are the initials of the coins designer John Sinnock, This coin have no Mint mark . So it was made by the Philadelphia Mint , If It has  D Mark , It was made by Denver Mint.