The Pyrex Primary Blue Refrigerator Dish T.M. Reg 502-B Vintage is a solid rectangular dish made of glass with a glossy finish. This vintage Pyrex dish, manufactured in the 1950s in the United States, features an impressed backstamp and belongs to the Pyrex 502-B model line. The dish has one compartment and is in its original production style, showcasing a milk glass production technique. Perfect for collectors of vintage kitchenware, this nostalgic piece brings a touch of retro charm to any kitchen setting. Areas of wear, discoloration, and paint chipping pictured. All items are shipped using recycled materials. Please allow three business days from time of purchase for shipping. Open to offers. Don’t forget to leave a review if you love your purchase!