This was my subpanel until a couple weeks ago. Originally it was the service to the house, built in 1958. A 50 amp service. This is Federal Electrical Products Company. Note the label says it's UL "inspected" not "listed", though molded on the side of the breaker are the words " Use Only in Listed Enclosures." The hinged door cover was made to fit semi flush over an indoor panel to make it raintight. I don't know who made it.