All changes to tower
| Date | Change | Source |
|---|---|---|
| 6 Oct 2017 | fr1: maker,material,date added; fr9: added | Chris Pickford via e-mail |
| 3 Oct 2017 | frame: material removed | Chris Pickford via e-mail |
| 30 Sep 2017 | 1-5: frameid added; frame info added | David Sloman via e-mail |
| 22 Mar 2007 | Tenor note not G; nominal added (Ab-43c); ring nearer Ab | Andrew Higson via pNBR |