All changes to tower
| Date | Change | Source |
|---|---|---|
| 29 Aug 2017 | 1-5: frameid added; frame info added | David Sloman via e-mail |
| 10 Apr 2009 | 1,2: date amended | Chris Pickford via 00007254 |
| 8 Apr 2009 | 3: founder added; 3-5: canon info added | John Baldwin via database |
| 11 May 2005 | Tuning description and tenor nominal (Bb-6c) provided | Nick Bowden#52 via e-mail |