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).
Blueprint detailing components of a track system including wheels, runners, and bearings.
| Identifier | Morton\M7\ img057 | |
| Date | 26th January 1912 guessed | |
| Cast Steel Track Wheels. Cast Steel Runners. 2 fatHs Special flexible, Steel Wire Rope. Ball Swivel Bearing. 3" 4'-3" | ||