Set of 2 Old Vintage Anchor Hocking Oven Proof Mugs made in USA.  They are Red with a White inside and have embossed on the bottom "OVEN PROOF", an Anchor inside a Square Box, "312", "MADE IN USA".  Also one has the number 57 above the Anchor and the other has the number 58 above the Anchor.  I think they may be from the 1940's or 1950's, but am not sure of their exact age.  Good overall condition; there are no chips, cracks or scratches.  There are some scratches and paint fading, but are still nice and usable.