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).
Specification sheet for an Essex Radiator, detailing its weight, water capacity, and matrix measurements.
| Identifier | ExFiles\Box 21\6\ Scan099 | |
| Date | 27th October 1933 guessed | |
| ESSEX RADIATOR WEIGHT 57 LBS. WATER CAPACITY. 1 GALL. 1 1/2 PTS. MATRIX MEASUREMENTS. 18.125" 21.75" 4.125" 2.0625" | ||