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).
Data table with two sets of corresponding 'V' and 'X' values, marked as page 3.
| Identifier | ExFiles\Box 77\5\ scan0142 | |
| Date | 26th April 1917 guessed | |
| -3- V.{VIENNA} X. 38000 +17.59 38500 +17.71 39000 +17.82 39500 +17.93 40000 +18.04 40500 +18.15 41000 +18.26 41500 +18.36 42000 +18.46 42500 +18.57 43000 +18.67 43500 +18.77 44000 +18.87 V.{VIENNA} X. 44500 +18.97 45000 +19.06 45500 +19.16 46000 +19.26 46500 +19.35 47000 +19.44 47500 +19.53 48000 +19.62 48500 +19.71 49000 +19.80 49500 +19.89 50000 +19.98 O.K. E.F.C. | ||