The SX line was Innocenti’s late 60’s scooter. They were slightly upgraded from the earlier 60’s Series III models. The SX150 was the sporty 150cc model in the lineup. It was similar to the 150 Special, but with some minor motor improvements. They look fantastic, and this scooter is no exception. It was restored in Italy before we purchased it. The paint is really nice, and it looks great all around. An excellent riding scooter that looks just as good.