⭕ Original B&M Motorcycle siren. Quality made in Los Angeles, California. It is a B&M 2nd generation motorcycle siren with single port screws. They were produced from about 1955-1982. This siren is a counter-clockwise rotation which means it mounts on the right side of the rear wheel. Most Harley-Davidsons used right side mounts. This siren is in exc.cond., includes mounting hardware and is not corroded or banged up. The bearings are exc. and it runs smoothly.