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).
The results of pressure gauge tests on three different models of grease guns.
| Identifier | ExFiles\Box 76\4\ scan0268 | |
| Date | 5th April 1921 | |
| x4337 Mr. Hives. 5.4.21. x4337 x 3898 GREASE GUNS. Tested with pressure gauge - T.B. Andre, London 140 lbs. Hills, Sheffield R.R. 440 lbs. Alemite, U.S.A. 490 lbs. GWH.{George W. Hancock - Head Chateauroux} | ||