Two small silver saucers plates 6" diameter vintage Kromex ? 292g shiny

Kromex ? Two small silver saucers vintage plates 6" diameter unknown material no markings one has a small indentation in the center, about 2" diameter, like a teacup saucer the other has a larger center circle of about 3.5" total weight = 292g (11oz) some tarnish spots shiny on the top brushed metal, matte on bottom questions? please ask! grandma's collection