John Surtees was the only owner of this BMW 507, but, you can be it's 2nd owner.

John Surtees was fresh off winning the 500cc title in 1956, when he noticed a BMW 507 roadster at Germany's Hockenheim circuit undergoing testing.

Surtees was smitten and purchased one for himself, going half in with Count Agusta to buy the car. For the next 60 years, the car was driven regularly by Surtees, remaining in his possession until his death in March of 2017.

https://uncrate.com/one-owner-1957-bmw-507-roadster/