1931-S 10C MS66 Certification #60039290, PCGS #4986
According to a notice in the June 1934 issue of The Numismatist (p. 416), collectors could still purchase Uncirculated 1931-S Dimes for "the face value of the coins and an amount sufficient to cover the mail charrges by first-class mail."
Adolph Alexander Weinman
90% Silver, 10% Copper
The United States of America