He has a pretty impressive collection.
A friend of ours has a collection of Chevrolets-every convertible from 1913-1975 along with a series of other rare GM's from that time period.
He opens it up once a year to the public and the admission charges are donated to the local school system. Other than that showings are private for friends, car clubs, etc.
https://www.youtube.com/watch?v=N_cyRxsztM4