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).
Cost calculation for a modification and rebore job.
| Identifier | ExFiles\Box 107\2\ scan0057 | |
| Date | 3rd May 1938 guessed | |
| B68BN{W.O. Bentley / Mr Barrington} Mod C + rebore 55 hrs @ 1/8 18 1/2 " " 1/3 18 1/2 " " 1/3 Test 3 hrs " 1/3 adjust dappets & c 5 " " 1/4 Test 3 1/4 " " 1/8 1 3/4 " " 1/- 1 3/4 " " 7d. Total hrs 106 3/4 ss{S. Smith} 55 161 3/4 55 hrs @ 9d £4 " 11 " 8 2 " 1 " 3 2 " 6 " 3 3 " 9 6 " 8 5 " 5 1 " 9 1 " 0 1/4 £9 " 17 " 9 1/4 1D/4 | ||