Used Harley Hummer Horn.
Part number 69001-55A
Correct for the B model, 1955, 1956, 1957, 1958, and 1959 true Harley Hummer.
Does not fit the ST , Model 165.
Missing the rivoted mounting bracket, and has slight cracking in the rubber bulb, where it meets the base.
The rubber can be repaired, but this one still functions well as is.
A few minor flaws in the chrome plating, but overall this is very nice for a 75 year old part.