Mercury in Greek mythology was known as the “quick messenger” and was equipped with wings to better execute his duties. More about mercury dime coins and what they’re worth… Little-Known Facts About Mercury Dimes The portrait on the front of this coin was mistaken for (and bears resemblance to) the Greek god Mercury.īut the portrait is in fact of Liberty - the same figure that has graced U.S. To begin with, mercury dimes are misnamed.