What is the symbol on the back of a 1942 US dime?

Dimes minted from 1916 to 1945 are popularly known as Mercury dimes, because the winged liberty cap worn by Miss Liberty makes her appear very much like the Roman god Mercury. The reverse of all Mercury dimes show a fasces, olive branch, and the Words 'E Pluribus Unum' surrounded by 'ONE DIME' and 'UNITED STATES OF AMERICA'.