Monax white opalescent depression glass, vintage opal glass petalware cake salver plate

Unmarked petalware plate, 1930s vintage MacBeth Evans 'Monax' glass, opalescent white depression glass. This is 10 3/4" in diameter, the big cake or torte plate. It's in very good condition - just a few light utensil marks, no dulling or roughness, no chips.