Thanks for all the looks and guesses. before you say anything look closely. Look north west of the primary mm completely separate. Up inside the knot on the wreath.
The mark in the wreath is described as "die damage", not a completely separate mintmark. See the CONECA description here: http://varietyvista.com/09b WQ Vol 2/RPM Detail Pages/1957DRPM002.htm
I see die polishing here. Is that a die gouge above the right side of the mint mark? A marker for this variety?