I thought I'd turn to the experts when it comes to identifying a flag. It is a vintage 48 star 58"x113" US Flag with heavy galvanized flag loops and brass rivets (See Pictures). It has no markings I can discern and I would love to know more about it. It was my grandfather's. He was a Naval Aviator in WWII and I'm curious if that could be involved in some way. Thanks in Advance.