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).
Origin of chassis numbers 8-O-S and 9-O-S.
| Identifier | ExFiles\Box 5\2\ 02-page015 | |
| Date | 1st September 1925 | |
| Hs.{Lord Ernest Hives - Chair} X 5830 My/OB/HO/ 1.9.25. My attention has been drawn to the fact that Bodies have recently been purchased for two Chassis numbered 8-O-S and 9-O-S. We have no record of these Chassis having been manufactured in the ordinary course of production, and I should be glad if you would inform me whether they were built in your Department. My/OM/ | ||