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).
List of average hours worked per week for various manufacturing processes.
| Identifier | ExFiles\Box 176\2\ img031 | |
| Date | 30th January 1940 guessed | |
| [Illegible handwritten text] AVERAGE HOURS WORKED PER WEEK. 112 Centre Lathe - 124.06 114 Hand Turret - 584.37 116 Drilling - 91.04 118 Gear Cut - 29.42 120 Grinding - 74.55 122 Milling (small) - 20.61 123 Milling (large) - 176.42 125 Conn. Rods. - 131.68 128 Cyl. Blocks etc. - 138.28 336 Hand Turret No.4 - 248.71 320 Buffing & Polishing - 40.62 | ||