This vintage silver napkin ring is made of 925 silver. The napkin ring has an engine turned design, which is a type of decorative pattern created by using a machine to engrave a series of parallel lines onto the surface of the metal. This particular napkin ring was made by Crisford & Norris Ltd, a well-known and respected silver company based in Birmingham, UK, in 1961. Crisford & Norris Ltd, Birmingham 1961.