All changes to tower
| Date | Change | Source |
|---|---|---|
| 29 Jun 2011 | 1-6: nominal, canons, turning, frame id added; 1: wt amended | Andrew Higson via 00009455 |
| 3,5,6: diam amended; frame info added; tenor nominal amended | Andrew Higson via e-mail | |
| 4 Apr 2007 | Tenor nominal added (G-18c) | GAD NBR spreadsheet via pNBR |