Found this walking an abandoned line. Anyone know what it is? it's marked "SALEM" on both ends of both sides. It has a flip out mirror on one end. It is 24 1/2 inches long and very heavy. This is an overall pic. UPDATE: Found out this is a wind break/mirror from a locomotive cab window. Thanks to Gary Kline for the info. Now I gotta convince my wife to let me keep it ;-)