All changes to tower
| Date | Change | Source |
|---|---|---|
| 14 Feb 2017 | 5: canon info amended | Bob Parker via 00011973 |
| 3 Feb 2017 | 1-6: nominal added | David Kelly via e-mail |
| 29 Dec 2011 | 1-6: canon info, frameid added; frame info added | John Baldwin via database |
| 10 Jan 2011 | 1-6: diam added; 4,5: wt amended | Chris Pickford via 00009052 |
| 16 Sep 2006 | Tenor exact wt suggested (not app 11cwt) | Christopher Dalton (Bell Historians' msg 10944) via e-mail |