The Vintage Pyrex Mixing Bowls Butterfly Gold II 401 and 402 are a two-piece set of round, yellow glass bowls with a glossy finish. Made in America by PYREX in 1979, these vintage bowls feature a Butterfly Gold II pattern with an incised backstamp. The set includes a 4-quart bowl (401) and a 2-quart bowl (402), perfect for mixing and serving a variety of dishes. A classic addition to any kitchen, these mid-20th-century bowls are both functional and decorative, adding a touch of nostalgia to your cooking experience.