Blueprint of a P.II. Low Inertia Crankshaft Damper.
| Identifier | Morton\M19\ img106 | |
| Date | 26th August 1930 guessed | |
| P.II. Low Inertia Crankshaft Damper, PLATE .075 THICK., A, X, Y | ||
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).