Has some scratches from normal wear. Looks like the quarts size was somehow rubbed off. Not sure how someone was able to do that. This is a vintage Pyrex Primary Green #403 mixing bowl, which is a collectible item. Part of the first Pyrex opal ware set: The "Primary Colors" set was the first opal ware produced by Pyrex. Size: It is the 8.5-inch bowl in the set, with a capacity of 2.5 quarts. Material: The bowl is made of glass and was manufactured in the USA. Era: These bowls date back to the early 1940s, with a redesign of the base in the 1950s