【Product Description】 Pyrex was born in 1915 as a household heat-resistant glass product by Corning (founded in 1851), a veteran glass manufacturer that also supplied Edison's incandescent light bulbs. It was named "Pyrex" because the first product made was a pie plate. This is a Pyrex Golden Butterfly butter dish. Size: 9cm (length) x 17.5cm (width) 【Condition】 There are no noticeable signs of deterioration such as scratches or stains from use. There are watermarks, which are often seen in this type of product, on this refrigerator dish (photo 8). Since industrial products of that time relied heavily on human hands, the quality of each product was different, and this is one of the joys of vintage items, which live on as individual characteristics.