Have here a Vintage Brass Ignition Switch 3 Posts Off On Start Cole Boston with 2 Keys. It is in really nice condition(see pictures) but has not been tested as we have no way to test it. It has the off/lock position, the on the position and the start position. Keys turn it nicely and it springs back to the on position from the start position when you release the key.It measures approximately 2 7/8" not including the key. The widest part is approximatley 1 3/8" across.