All changes to tower
| Date | Change | Source |
|---|---|---|
| 29 Oct 2018 | 3-7: (app) wt added | George Brightman via 00013135 |
| 30 Sep 2017 | 1,2: wt added | David Sloman via 00012466 |
| 5 Dec 2012 | 1-8: turning added; 8: canon info added; frame info amended | George Dawson via 00010168 |
| 12 Jun 2010 | 1,2: diam,date,founder,canon info added | John Greenhough via e-mail |