This scalloped edge oval milk glass vanity or dresser tray was made by Imperial Glass Company. The pattern is called Windmill, originally a 1912 carnival glass design. Imperial brought it back as a milk glass in 1950, and later brought it back again in modern carnival and slag glass.
The tray measures 9-3/4 by 6-3/4 inches. In the center is a Dutch windmill landscape scene in high relief, bordered by flowers and leaves. It's in perfect condition with no damage or wear. It is unmarked, which is appropriate to the 1950 production date. The original owner had the tray displayed as a wall decoration, so I will include the wall plate hanger it came with.
Imperial Windmill Milk Glass Dresser Tray