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).
List of vehicle components and their corresponding L.O.P. part numbers.
| Identifier | ExFiles\Box 169\1\ img061 | |
| Date | 1st April 1930 | |
| (4) RHC{R. H. Coverley - Production Engineer}/WSC{W. S. Cassel}1/MS1.4.30. Front Axle & Brakes to L.O.P. G.77562. Cross Steering Tube to L.O.P. G.77482. Rear Spare Wheel Carrier to L.O.P. D.72583. Battery & Fittings to L.O.P. F.80947. P & R.{Sir Henry Royce} Type Battery. Luggage Grid to L.O.P. D.72135. RHC{R. H. Coverley - Production Engineer}/WSC.{W. S. Cassel} | ||