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 40/50 HP cars fitted with modified Telegage heads.
| Identifier | ExFiles\Box 61\3\ scan0211 | |
| Date | 9th July 1931 guessed | |
| 40/50 h.p. Rolls-Royce Cars fitted with modified Telegage heads. 126XJ 22GY 92XJ 110GY 51GN 108GY 197GN 31XJ 23WJ 158GY 78GY 10GY 203GY 73GY 12XJ 27 GN 23GY 129GN 86 XJ 45GY 166GN 204GY 28GY 95GN 88GY 66GY 90 GY 310R 109GN 171GN 87GY 6 WJ 156GN 84WJ 29XJ 83GY 154GY 205GY 180GN 28GY 143GN 196GN 44XJ 70GY 201XJ 117GY 52GY 100GY 116GY 91GY 64GY 191XJ 23XJ 112GY 115GY 157GN 76GY 32GY 172XJ 42GY | ||