All changes to tower
| Date | Change | Source |
|---|---|---|
| 4 Sep 2015 | 3: wt amended | Philip Denton via e-mail |
| 7 Jan 2012 | 1,2: (app) wt added; 1-5: frame id added; frame info added | John Baldwin via database |
| 21 Oct 2009 | 1-4: diam, canon status added | [George Massey] via e-mail |
| 21 Nov 2004 | Previous wt estimate of 19cwt too high for 46.75" diameter | David Bryant via e-mail |