This is a Technical Data Manual dated 22/9/31, book 1. The book gives details on the 5/1 through to the 38/4 cold start engines. It details h.p. and Torque graphs to fuel consumption, also bore sizes valve timing etc. this book is old and fragile and really needs to be restored to preserve the factory data as it was printed by R.A.Lister and co. Ltd. and is a typed page folder with metal bindings. It is probably a "one off".