Victorian Large Sterling Silver & Niello Coin Holder Locket

Niello is the art of ornamenting metal surfaces that is thought to have originated with the Egyptians and spread throughout Europe in the Middle Ages. It is enamel-like substance made alloys of sulfur, copper, silver and lead and used as an inlay on engraved metal. This fantastic piece is an excellent example of the Niello artform! An exquisite coin holder/locket from the Victorian period (ca1880). This fabulous piece is made of sterling silver and is a large, rounded rectangular shape. A beautiful striped Niello pattern is inlaid into the surface of the piece which covers the entire front, back, and sides of the piece. A small push button clasp rests at the top of the locket which allows the front to open and reveal two expandable coin slots. One slot is slightly larger than the other and both appear to be made of sterling silver. There is a round bail at the top of the locket which is hinged at the base. The bail has a marking however I am unable to make out exactly what it says. The