1942/1 10C FS-101 MS66 Full Bands PCGS. The first notice of the 1942/1 Mercury dime variety came from an article in the March 1943 Numismatic Scrapbook, where Arnold Cohn of Kingston, New York, reported his discovery of a specimen. The magazine's editor, Lee F. Hewitt, submitted the dime in question to Mint Chief Engraver John R. Sinnock for authentication. David Lange reports in his series reference that Sinnock first suggested that the coin was created by a 1941 dime being overstruck with a 1942 die.