All changes to tower
| Date | Change | Source |
|---|---|---|
| 31 Jan 2013 | 1-8: turning added; 1-7: nominal added; 8: nominal amended | Andrew Higson via 00010275 |
| 15 Dec 2012 | 1-4: canon info amended; 1-8: frame id added | Stuart Hutchieson via 00010179 |
| 3 May 2006 | Tenor nominal added (F+21c) | Andrew Higson via e-mail |