I bought the pictured tea set yesterday, on the bottom of one of the pots it has E.P.N.S. (ElectroPlated Nickel Silver) the other pot has E.P.N (maybe the S. is missing) and the bowl has E.I.N.S. It has a dull finish and did have what appeared to have some tarnish on it. After polishing the tarnish was removed the finish remained dull. Any help on identification would be appreciated.