Bristol occupies a unique spot in British motor history. Founded by the Bristol Aeroplane Company after World War II, it manufactured hand-built luxury cars. Not as well known as Aston Martin or Jensen, its early cars are extremely rare today. That's why it's unlikely to see one turn up in a barn, especially an early 1960s Bristol 408.
Built from 1963 to 1965, the Bristol 408 was motivated by a 5.1-liter Chrysler V8 engine and push-button automatic transmission. According to Jonny Smith of the Late Brake Show YouTube channel, 83 cars were produced, and less than 10 remain worldwide.