Gearbox Diagram
(Neg #3166)
Dated: 23 ??? 1933

Rear Axle Unit - Prototype (?)
(Neg. #3167)

Front Suspension
(Neg. #3459)

Front Suspension
(Neg #3460)
Dated: 26 Oct 1934

T77 Engine Drawing, Cut-A-Way View
(Neg. #3500)

Central Lubrication System Diagram

Bosch Electrical Diagram
(Neg #3527)