1930s or 40s vintage vanity table surround mirror with shabby very worn silvering. This would make a lovely light filled background behind displays, or to hang on a windowless wall. It's frame-less, with such a pretty, simple shape.
It's 18 1/2" wide overall, center panel 8" wide x 12" tall, sides are 5" wide x 10". The masonite hardboard backing is somewhat spotted from age, but the hinges still work well so you can easily fold this for storage.