All changes to tower
| Date | Change | Source |
|---|---|---|
| 19 Jan 2017 | 1-5: turning,diam added; 6: turning added,diam amended | Peter Dyson via e-mail |
| 8 Oct 2016 | frame: date added | David Sloman via e-mail |
| 29 Jun 2011 | 1-6: canon info, frame id added; frame info added | Philip Denton via 00009458 |
| 17 Feb 2011 | 1-5: wt added | Michael Orme via 00009155 |
| 8 Nov 2004 | Tenor nominal added | Bill Hibbert via e-mail |