vintage American Sweetheart Monax white opalescent depression glass bread & butter plates

1930s vintage Macbeth Evans white opalescent "Monax" glass plates, American Sweetheart pattern. This is a set of four plates 6 1/4" in diameter, no chips or scratching to any.

One of these has very slight yellowing, I think? If so, probably original to the plate as these don't look as though they were ever used.