Vintage Pyrex #401 mixing bowl turquoise blue finish Robins Egg Blue 1 1/2 pint

This specific bowl has a capacity of 1 1/2 pints (approximately 750 mL) and measures about 5.75 inches in diameter. Model Number: 401 is the smallest bowl in the standard 400-series nesting set.Date of Manufacture: Bowls with this specific backstamp—using all capital letters and including Ovenware—typically date to the 1950s. The solid turquoise color was introduced around 1956.Material: It is made of Opal milk glass with a fired-on color exterior.