St. Benedict ""Devil-Chasing" Medal Button

A cross, containing the letters C S S M L - N D S M D, initials of the words Crux sacra sit mihi lux! Non [Nunquam?] draco sit mihi dux! ("May the holy cross be my light! May the dragon never be my overlord!"). The large C S P B stand for Crux Sancti Patris Benedicti ("The Cross of [our] Holy Father Benedict"). Surrounding the back of the medal are the letters V R S N S M V - S M Q L I V B, in reference to Vade retro satana: Vade retro Satana! Nunquam suade mihi vana! Sunt mala quae libas. Ipse venena bibas! ("Begone Satan! Never tempt me with your vanities! What you offer me is evil. Drink the poison yourself!") and finally, located at the top is the word PAX which means "peace".