Vintage Mayer China Demitassi, Espresso, tea cup & saucer set 157, 457 maroon

This listing is for a vintage, 1957 espresso/tea cup and saucer. I do not see any chips or cracks. Comes from a smoke-free home but I do have a dog and a cat (noted for those that might have allergies). Mayer China Beaver Falls PA USA Saucer is solid color maroon/burgundy/wine or fig with a gold rim and marked 157. Tea cup or espresso cup, depending on how you want to use it, is marked 457 There are some signs of use like a few surface scratches that you can see in the pics but I feel they are really less noticeable than they appear in the pics due to the lighting. When searching online, the only other one that I found similar was marked on the bottom of the plate American Export Line" but I do not know if this is part of those. It had the same date stamp of 157.