Vintage brass Maserati horns

Please could someone with knowledge of vintage Maserati car horns help me to identify and possibly value a pair of fully working horns that I have recently acquired?

It would be very useful to know what models brass horns used to be on and the sort of collector that might be interested in buying them, and tips on where to advertise in from the UK.

I look forward to hearing from anyone who might have some clues as to the origins and possible value of the horns I have (which have the Maserati badge in silver on the back of the horn).

Thanks