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).
Page 2 of a letter from R. A. Rothermel, Ltd. offering sample engine rings and guaranteeing improved performance.
| Identifier | ExFiles\Box 16\1\ Scan168 | |
| Date | 18th December 1924 guessed | |
| ( 2 ) or more sets for your engines without charge and without any obli-gation on your part, if you will let us have blue prints showing your present ring construction. We feel perfectly safe in guaranteeing that if you adopt these Rings, you will get more mileage to a gallon of fuel and more mileage to a gallon of oil. Carbon deposit will be reduced, and you will have no difficulty whatever from oiled plugs. We hope that we may have the pleasure of hearing from you with the necessary particulars, so that we can make you up sample rings, by return, and beg to remain, Yours very truly, R.{Sir Henry Royce} A.{Mr Adams} ROTHERMEL, Ltd. | ||