This is an original salvaged ship decks fire detection sign.  This sign illustrates the fire detection zones and symbols for all decks on a particular ship.  We do not know which ship it came from.  The sign has an aluminum face with print in black.  It measures 17 3/8 inches x 23 inches.  There are two tabs on the back for hanging on the wall.  This ship decks fire detection sign weighs about 4 1/2 pounds.