RRC 428 feels pretty well explained by Crawford. The one point I can’t wrap my head around is what the curule chair is doing on the coin. As far as I can make out, one only gets the chair with imperium. Vestals get lictors, but those are the special religious kind (lictores curiati) which had no fasces and no axes. The other logical explanation would be the chair of L. Cassius Longinus Ravilla (cos. 127) who re-tried the three delinquent Virgins. BUT, he was appointed to hold the quaestio by the people at the instigation of a tribune of the plebs (so Ascon. 46C), so he shouldn’t have had any imperium and certainly not a curule chair!