antique green glass lamp shade for ceiling fixture light, vintage 1920s lighting

Beautiful vintage frosted glass lamp shade for an old electric ceiling light fixture, early 1920s at our best guess. This has a colored finish in pale aqua green against clear glass, and a ribbed acanthus leaf pattern, Art Nouveau / William Morris style.

The shade is heavy pressed glass, with mounting holes at either end of the square shade. It measures 9" from center of hole to center of hole, and about 4" deep. The shade is in very nice condition, no chips or cracks, very little wear or scratching to the colored finish.