Small Tea & Coffee Pot

Hello can you tell me a little bit about this set if you know. I am not even sure of what it is made from. Under the coffee pot is a small circle and below it the numbers 346 or 340 hard to tell. The tea pot has I think two small stamps very hard to read one is an “S” I think and the other too hard to read. They are only small and measure 74mm high on the teapot and weighs 180grams and the coffee pot is approx 105mm high and weighs 350grams. I would like to know anything about them that you may know. Much appreciated!
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They don’t look silver to me if I’m honest, if they were they’d be worth around £200, more depending on maker and era.