All changes to tower
| Date | Change | Source |
|---|---|---|
| 12 Jun 2020 | 1-6: note amended | Chris Pickford via e-mail |
| 5 Jun 2020 | 2-6: turning added; fr9: details added | Chris Pickford via 00013798 |
| 1 Aug 2018 | 1-6: frameid added; 1: turning added; frame info added | Chris Pickford via 00013009 |
| 6 Mar 2007 | Tenor nominal added (Ab+1c) | Andrew Higson via pNBR |