art deco vintage ebony elegant glass salad plates, opaque black color not amethyst

Set of four ebony black glass salad plates, cut foot, beautifully heavy and well made. These are 7 1/2" in diameter across the rims. All four plates are in excellent condition without damage or wear, never used.

Classic, plain shape without pressed pattern or etch, probably 1920s vintage, I think. No makers marks. These are opaque, ebony black glass - no amethyst color when held to the light.