With company contact details and a name.
| Identifier | ExFiles\Box 9\7\ 07-page170 | |
| Date | 10th May 1938 guessed | |
| Tempered Spring Co Ltd Burton Weir Works Sheffield 4 G. {Mr Griffiths - Chief Accountant / Mr Gnapp} Young | ||
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).