List of modifications and specifications for various vehicle components and their corresponding reference numbers.
| Identifier | ExFiles\Box 169\1\ img182 | |
| Date | 22th June 1931 | |
| -6- RHC {R. H. Coverley - Production Engineer} /WSC {W. S. Cassel} 2/IS.22.6.31 Rear Hub to LOP. G.78505. G.79012 Brake Drums - 40% Stiffer Type. Front Axle & Brakes to LOP. G.78450. Brake Shoes re-lined with Ferodo Bonded Asbestos - G.79445-6. Modified Feed Tube in Axle Pivot Pins to G.L. 431. Cross Steering Tube to LOP.G.77482. Battery & Fittings to LOP.F.80947. Wiring & Fittings to LOP.F.FC780. D.73361-2 Conduits - replacing F.80450-1 to suit Engine Diamond Mounting to LeC.2911. Rear Spare Wheel Carrier to LOP. D.73067. Head Lamps & Fittings to LOP.D.72797. RHC {R. H. Coverley - Production Engineer} /WSC. {W. S. Cassel} | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).