Both the real thing and models.
The collection shown here has now been broken up and sold due to the death of Dave Spurgeon. No, I did not buy any of it!
One of two - possibly three or four - race car transporters built by Fiat. The 642 RN was built on a bus chassis, and is in a private collection in Bellevue, Washington
Repository for information about this fascinating machine and a model of it.