Jefferson nickel
... that Felix Schlag won the prize for designing the Jefferson nickel, but was required to submit an entirely new "tails" or reverse side?
... that <a href="./Felix_Schlag" id="mwB34" rel="mw:WikiLink" title="Felix Schlag">Felix Schlag</a> won the prize for designing the <b id="mwB38"><a href="./Jefferson_nickel" id="mwB4A" rel="mw:WikiLink" title="Jefferson nickel">Jefferson nickel</a></b>, but was required to submit an entirely new "tails" or <a href="./Obverse_and_reverse" id="mwB4E" rel="mw:WikiLink" title="Obverse and reverse">reverse</a> side?