Correct. The horn (as fitted in the US) does not match the car.
68 Chevy it is.
It is certainly not the horn in the fourth MINIusa production. Nothing distinctive at all.
Why advertise a Beep Beep horn, then install bland?
Might have to go back to eBay again.
I did see that there are some AAAOOOGAA horns available at JC Whitney
Jim Ray