Web site: https://www.ancient-jewellery.com/
This is a nice Renaissance silver box reliquary pendant/ possibly for a girdle book, dating to the 16th century. It is decorated with IHS (for Jesus) with the AM monogram for "Ave Maria". The box lid opens to reveal a compartment for a relic or a small prayer book. The box is intact but worn through centuries of devotional use.
OBJECT: Devotional Pendant or Girdle Book hanger
DATE: 16th century
SIZE: 47.1mm x 43.1mm x 11.5mm
WEIGHT: 30.85 grams
PROVENANCE: Formerly in a European private collection, Spain.