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).
List of parts purchased in the U.S.A. with their costs in dollars.
| Identifier | ExFiles\Box 174\2\ img145 | |
| Date | 7th May 1937 guessed | |
| -3- PARTS BOUGHT - U.S.A. Dollars. Two Tyres - P.III 40.72 Packard Exhaust System 6.50 Part Payment - Lincoln Brake Drum 3.63 50.85 | ||