Crossword Clue:

MILLING a corrugated edge on a coin

AnswerCrossword Clue
MILLRaised edge on a coin.
NURLRidge on a coin edge: Var.
KNURLRidge on the edge of a coin.
NURLRidge on the edge of a coin: Var.
REEDEDMade grooves on, as the edge of a coin