Very nice red glass lens. Possibly for railroad lantern, I am not sure what it was used for. The lens is concave, measures about 4 3/4 inches across the lens. There are a few very small air bubbles in the glass. I did not find any information, such as the maker, on the lens. It could be there, and I just didn't find it. The lens looks to be in very good condition. Sold as is,no returns, no refunds.