Bob
This is a thing that a lot of discussions create in Italy, you are right, these changes belong to the history, but the mentality of the Italian collector is that to bring the motorcycle under the original conditions of when the motorcycle was born, in Italy an original motorcycle to 100% is worth as if it were built in gold.
I think as you, also because it is evident that these changes to this Rudge have been made in a concessionaire of motorcycles and not from a blacksmith for horses, but this motorcycle is unsalable under these conditions, and if this motorcycle is sold without informing a buyer of these changes the seller can be tried for fraud.
Thanks Bob for all the information and your help: Davide