Rare WW2 US Navy Dodge Chrysler Sperry Gyro Compass Repeater, its made of solid Brass . There only 5500 made between 1942 & 1945

http://www.ebay.com/itm/RARE-WW2-US-NAVY-DODGE-CHRYSLER-SPERRY-BRASS-GYRO-COMPASS-REPEATER-/252730361104?_trksid=p2141725.m3641.l6368