Silver or Silver plate?
First, look for the obvious. Turn the piece over and look for the letters "EP" or "EPNS" stamped into the metal. As you may have guessed, EP stands for electroplate. EPNS indicates that the object was electroplated with silver or nickel.
Sterling Silver
The commonest British standard of silver purity, dating back to the currency in use in England in the 14th century, comprising 92.5% pure silver and the balance of copper and other traces. Now widely accepted as an international standard.
Sheffield Plate
Some people mistakenly refer to all silver plate as Sheffield plate. Sheffield plate is a process that was invented in England about 250 years ago. Sheets of silver and sheets of copper were hammered together until the two became fused. The fused metal was shaped and formed into objects in the same way that silver objects were made. Electroplating, the same process used today, was developed in the middle of the last century.
A characteristic of Sheffield plate is its pleasing, warm color, which is the same as sterling silver. Electroplated objects, on the other hand, have a hard, shiny surface, and lack the warm color. The reason for this is that sterling silver is actually an alloy, consisting of silver and copper. The surface of an electroplated piece, on the other hand, is pure silver.
Britannia Metal
Silvery-white alloy similar to pewter but harder and stronger. Composed of approximately 92% tin, 6% antimony and 2% copper. Often used for making utensils, drinking vessels and decorative tableware. Victorian antiques can be found with Electroplated Britannia metal. (EPBM)

