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).
Cover or mailer concerning 'Road Comfort' from The Retrac Co.
| Identifier | ExFiles\Box 46\1\ Scan137 | |
| Date | 1st January 1918 guessed | |
| THE RETRAC CO. OIL SPRINGS Road Comfort For X2628 PLACE ONE CENT STAMP HERE | ||