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 specifications for feeler gauges and tool marking for the 3½ Litre Bentley.
| Identifier | ExFiles\Box 155\4\ scan0076 | |
| Date | 4th July 1933 | |
| 1320 To By.{R.W. Bailey - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey}6/KT.4. 7.33. c. By/HEB.{H. Biraben} 3½ Litre Bentley. We are in agreement with your suggestions for feeler gauges for this car, viz: .002", .003", .004", .010", .018" (Distributor contact maker), .025". It should be noted that it will be necessary to obtain a special sparking plug gauge from the plug manufacturers and supply one with the tool kit on each chassis. The feeler gauges, wethink, should be marked, "Bentley". All other spanners, which on our other cars are marked "Rolls Royce" should also be marked "Bentley". Hs{Lord Ernest Hives - Chair}/Lid.{A. J. Lidsey} | ||