This is a Fire King peach luster-colored gratin dish. It is a product of Fire King, a heat-resistant glass brand manufactured by the Anchor Hocking Company of America. The inside of the milk glass is decorated with a glossy luster finish (peach luster). It is popular in Japan as a vintage item. It is a practical dish that can be used for oven cooking. This is a set of 5 dishes. Made in the USA. The age is unknown, but it is from before the 1980s. The size is approximately 16cm x approximately 13cm. Please forgive slight errors due to amateur measurements. There are no major scratches or chips. There may be minor scratches due to aging. We ask for your understanding before purchasing. It is difficult to find a set of 5. How about it for those who are collecting? Thank you.