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).
Comparison of actual versus drawing specifications for Bentley III front suspension springs.
| Identifier | ExFiles\Box 100\1\ scan0047 | |
| Date | 9th October 1937 guessed | |
| FB 3080 Bentley III Springs 200B 446 (Front Suspension) ACTUAL | DWG. | ERROR ① Length 11.500 | 11.450 | +0.050 OS Outside dia. 5.510 | 5.500 | +0.010 Inside 4.195 | 4.182 | +0.013 Dia of wire .660 | .659 | +.001 Load @ 8.130" 1084 lbs. | 1132 lbs. | -48 lbs " @ 6.340" 1769 lbs. | 1743 lbs. | +26 lbs ② Length 11.480 | 11.450 | +0.030 NS{Norman Scott} Outside dia 5.513 | 5.500 | +0.013 Inside dia 4.200 | 4.182 | +0.018 Dia of wire .660 | .659 | +.001 Load @ 8.130" 1064 lbs | 1132 lbs | -68 lbs " @ 6.340" 1722 lbs | 1743 lbs | -21 lbs Material S/SLM | ||