A gorgeous antique set. It has great historical value. British jewelry hallmarks applied to the inside of the ring. What do these hallmarks mean: Maker's Mark: MN&WB This is the official name hallmark of the famous British company Mappin & Webb Ltd. This marking variant (MN&WB or Mn&Wb) was actively registered and used by the jewelry house for products manufactured in London and Sheffield, beginning in the late 19th century and throughout the 20th century. Lion Passant: The hallmark in the form of a lion figure (pictured above the letters) is a traditional British guarantee mark for sterling silver. It confirms that the alloy contains at least 92.5% pure silver. Assay Office Mark and Date Letter: Other stamps in the row indicate the assay office (the city where the item was tested, for example, a leopard head for London or an anchor for Birmingham) and the specific year of manufacture, encrypted with a certain letter of the alphabet. vintage jewelry set with cameos, consisting of a pendant on a chain and a ring. Features of the set: Material of inserts: Cameos are made using the traditional bas-relief technique on a natural two-tone sea shell (characteristic soft orange or brownish background and white relief profile). Subject: Classic female profile in an antique style, facing to the side.