The most common was EPNS (Electro Plated Nickel Silver), but many other symbols were used, as EBPM (Electro Plated Britannia Metal), EPCA (Electro Plated Copper Alloy), PGS (Plated German silver), MP (Magnetic Plating), PS (Plated Steel), WP (White metal Plated), EP (Electro Plated) and others that I was unable to identify with certainty (BP) a strong, hard magnetic silvery-gray metal, the chemical element of atomic number 26, much used as a material for construction and manufacturing, especially in the form of steel. lead Lead is a chemical element in the carbon group with symbol Pb and atomic number 82.