Specification revision document for a vacuum pump, detailing an updated cylinder and base plate.
| Identifier | ExFiles\Box 169\1\ img028 | |
| Date | 1st December 1929 | |
| (2) RHC {R. H. Coverley - Production Engineer} /WSC {W. S. Cassel} 14/MSS.12.29. Previous Specification Vacuum Pump - LOP. E.78843. Revised Specification Vacuum Pump - LOP. E.78843 Cylinder with internal passage for Oil Drain E.79535 and slotted base plate E.79536. 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).