I don't know much about these other than the obvious. The china belonged to the hubby's Grandma and is at least 40 years old - may be older as it may have belonged to his G-Gma but not sure. I looked on replacements and see nothing to match the mark - poked around some obvious named patterns but no luck so thought I'd try here. Don't really need a value as we aren't selling - actually may need to buy a few.
Thanks for your help! (PS: I'll keep looking on replacements too so if this is labor intensive, don't bother. I'm just hoping someone would know)
Front
Close Up of pattern - is rough - maybe a decal?
Marks on back of plate - The one in the lower left corner looks like an amperstan...