Sterling Silver Enamel Disc Pendant or Charm - Religious Saint Christopher

Dating to the 1960s/1970s or so, here's a Sterling Silver (hallmarked as pictured) and enamel disc charm depicting St Christopher to the front. The engraved sentiment is Saint Christopher Protect Us. Size is 3/4" wide/high not including the ring and bale. Weight is 2.7 grams. Condition is very nice with no problems I can spot.