All changes to tower
| Date | Change | Source |
|---|---|---|
| 21 Nov 2016 | 1-8: canon info added | David Sloman via 00011859 |
| 9 May 2012 | 1-7: nominal added; 1-8: frame id added; frame info added | John Baldwin via database |
| 24 Sep 2005 | Tenor nominal added (=F#-22c) | Tim Jackson#84 (from Dickon Love) via e-mail |
| 5 Jan 2004 | URL amended | Dickon Love via e-mail |