It has the W mark for Westmoreland.
Rare Antique Westmoreland cobalt blue glass Colgate washboard advertisement 5"
Westmoreland Cobalt Blue Cat On A Nest Glass Candy Dish
Westmoreland Cobalt Blue Glass Basket English Hobnail Pattern
Vtg Westmoreland Satin Blue Glass Hen On Nest Salt Cellar Split Tail 3.5"
Vtg Cobalt Blue Glass Hen an Nest Basket Covered Candy Dish Split Tail LG Wright
Vintage Cobalt Blue Glass Hen on Nest TOP ONLY Replacement Lid
