Sheffield technique of silver plating over copper - Sheffield Plating is a process whereby an ingot of copper is fused by heat with a thinner layer or sometimes a sandwich of silver. It then acts as a single entity that can be hammered or rolled into sheets and then formed into objects. Some wear of silver normal with age. Tray is 21 in diameter. The item "Vintage English Silverplate Sheffield Tea & Coffee set 6 Pieces" is in sale since Saturday, April 17, 2021.This item is in the category "Antiques\Silver\Silverplate\Tea/Coffee Pots & Sets". The seller is "donnadonna415" and is located in San Francisco, California. This item can be shipped to United States.