McLaren M7c 1969
While the M7A type bathtub chassis were tough and accessible, they lacked some of the torsional rigidity achieved in the 1968 Formula A/5000 cars.
Consequently one F1 car was built using a full "up and over" monocoque chassis identical to the M10A 5-litre cars and the machine, known as M7C-1, was Bruce's personal car in the 1969 F1 season. In general specification it was similar to the M7A cars.