Silvered bronze. Shield shape with a medial bar. 7/8” height plus the suspension loop. The shield form is called an escutcheon represents the arms of a family. In this instance, it is a “charge”, a symbol from within the coat of arms as indicated by the vertical bar. It would identify the wearer’s family and as a member of the noble class. Professionally refurbished with the silver overlay restored, on a Sterling silver neck chain for contemporary wear.