Hello Targhediferro,
My source explain that's a Lambretta Lambro and product by Innocenti.
Innocenti use the name "Lambretta" because her factory, who build scooter, was in Lambrate, near Milan. I don't know if the car Lambro was build in this place.
I think, if Kwgibbs propose me Innocenti and not Lambretta, I woud accept.