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).
Specification table for Spectre & 20/25 HP steering part cams.
| Identifier | ExFiles\Box 95\1\ scan0221 | |
| Date | 27th September 1935 | |
| X 350 SpectreCodename for Phantom III & 20/25 HP, Steering Parts. C A M S. L.H. for SpectreCodename for Phantom III. R.H. for 25 HP. | No. | Hand | Lead | Bearings | Crowning | Our No. | Adamant No. | |-----|------|-------|----------|----------|---------|-------------| | 1 | L.H. | 0.800 | A | 0.005 | F.87551 | M.21238 | | 2 | L.H. | 0.800 | A | 0.002 | | M.21508 | | 3 | L.H. | 0.800 | T | 0.005 | F.87835 | | | 4 | L.H. | 0.700 | A | 0.002 | F.87681 | M.21477 | | 5 | L.H. | 0.700 | T | 0.005 | F.87834 | | | 6 | R.H. | 0.800 | A | 0.005 | F.61001 | M.21115 | | 7 | R.H. | 0.800 | A | 0.002 | | M.21533 | | 8 | R.H. | 0.800 | T | 0.005 | F.60994 | | | 9 | R.H. | 0.700 | A | 0.002 | | M.21534 | | 10 | R.H. | 0.700 | T | 0.005 | F.60995 | | Hs{Lord Ernest Hives - Chair}/F.J.H. | ||