What you're seeing here is the oldest Pagani Zonda in existence. It was part of the original batch of Zonda C12s in 1999, and it's so old that its nickname at the factory is Nonno, meaning "grandpa" in Italian.
Over the years, it has served as the development mule for all subsequent variants of Horacio Pagani's rolling sculpture, accruing an astounding 1.1 million kilometers (approximately 680,000 miles) on the odometer in 14 years. As years passed, the company continuously upgraded this vehicle with its latest development, bringing it up to 760RS spec, the same as delivered recently to Lewis Hamilton (albeit minus the manual transmission spec'd by the F1 star)
How is Nonno holding up in its old age? Pretty darn well judging from this video where Pagani's test driver, the aptly named Davide Testi, simply rips on this old car along the back roads of Pagani's hometown of Modena.
Perhaps he's looking for a Ferrari test driver to race ...