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).
Blueprint of an oil filter and non-return valve type lubricator for a 20HP front axle.
| Identifier | ExFiles\Box 51\3\ Scan145 | |
| Date | 10th June 1929 | |
| GL {G. Linnett} 328 DIMENSIONS OF HEXAGON .813 CORNERS .709 FLATS G53668 G53803 S/M .375 SCREW .4375 DIA. 18 T.P.I.R.H. LIMITED DRAWING ROOM 10 JUN 1929 DERBY OIL FILTER & NON-RETURN VALVE TYPE LUBRICATOR 20HP. FRONT AXLE SEC 7040 SCALE 1/1 GL {G. Linnett} 328 | ||