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 part modifications and corresponding reference numbers for various engine components.
| Identifier | ExFiles\Box 169\1\ img085 | |
| Date | 21th June 1930 | |
| (3) RHC{R. H. Coverley - Production Engineer}/WWC1/MS21.6.30 Wheelcase & Fittings to LOP. E.78959. To suit Low Inertia Spring Drive. Water Connections to LOP. E.78995 - N.S.3062 - LeC 2789. E.80780 Outlet Connection. } To suit revised E.80783 Bottom Water Pipe. } Radiator. Oil Fittings to LOP. E.80669 - LeC 2791. To suit Auto Kleen Filter. Oil Filler to LOP. E.78965. Improved Filler E.80766. Oil Filter to LOP. E.80689 - LeC 2788. Filter Cover E.80650 to suit revised Sump Drain Plug. Oil Level Indicator to LOP. E.79004. Oil Relief Valve to LOP. E.78889 - LeC 2791 - Scheme 1247/S. Bottom Casing E.80665 to suit Auto Kleen Filter. Auto Kleen Filter to LOP. E.80670 - LeC 2800. Scroll Clutch Device replaced by Ratchet Freewheel. Fan to LOP. E.79092. contd. | ||