This horn measures about 10" long and about 5" in diameter. It is made by the Maxim Automobile Supply Mfg. Company in Brooklyn, New York. It has a brass bell, a three-hole mounting bracket and the original bakelite wire knobs. I would assume it would be from about 1913 to 1919ish. A good looking horn and in good condition. The price is 195.00 US..