1931 1C, RD MS67+ RD Certification #36203313, PCGS #2614
According to a notice in the June 1934 issue of The Numismatist (p. 416), collectors could still purchase Uncirculated 1931 Cents for "the face value of the coins and an amount sufficient to cover the mail charrges by first-class mail."
Victor David Brenner
95% Copper, 5% Tin and Zinc
The United States of America