A vintage deco style circa 1930's radiator cap? marked on one side "Anco Motector" and on the other side "SCOUT". The green glass globe is also marked "Anco Detector". It's approximately 4" in height. I do not know very much about this item, It looks to me like this is just the top of the device and that it attached to a cap or something else. Also, if you look at the underside, it appears that something is broken off at the center. The metal has numerous small cracks at the bottom and sides Due to Age. Otherwise, it shows overall moderate wear. A Nice Piece of Vintage Automobilia. Free s&h in the u.s