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).
Table outlining Spectre steering cam and roller combinations.
| Identifier | ExFiles\Box 95\1\ scan0204 | |
| Date | 4th September 1935 | |
| 4350 4/9/35 SPECTRECodename for Phantom III STEERING CAM AND ROLLER COMBINATIONS. | Cam | Cam Bearing | Roller | Roller Bearing | |---------------------------------|---------------------------|---------------------|-------------------------------| | F.{Mr Friese} 87551 L.H. .800 Lead. M.{Mr Moon / Mr Moore} 21238. | Adamant. PA.{Mr Paterson} 2262. P. 2104. | F.{Mr Friese} 87552. M.{Mr Moon / Mr Moore} 21116. | Adamant F.{Mr Friese} 87752 M.{Mr Moon / Mr Moore} 21422 A & B | | F.{Mr Friese} 87551 L.H. .800 Lead M.{Mr Moon / Mr Moore} 21238 | Adamant PA.{Mr Paterson} 2262 P. 2104 | F.{Mr Friese} 87756 | Timken A.{Mr Adams} 4059 A.{Mr Adams} 4138 | | F.{Mr Friese} 87681 L.H. .700 Lead M.{Mr Moon / Mr Moore} 21477 | Adamant PA.{Mr Paterson} 2262 P. 2104 | F.{Mr Friese} 87682 M.{Mr Moon / Mr Moore} 21504 | Ball Bearings. F.{Mr Friese} 87683/9 R.R. | | F.{Mr Friese} 87835 L.H. .800 Lead | Timken 31.C. | F.{Mr Friese} 87755 | Timken A.{Mr Adams} 4059 A.{Mr Adams} 4138 | | F.{Mr Friese} 87834 L.H. .700 Lead | Timken 31.C. | F.{Mr Friese} 87900 | Timken A.{Mr Adams} 4059 A.{Mr Adams} 4138 | | ||