All changes to tower
| Date | Change | Source |
|---|---|---|
| 20 Apr 2017 | 1-3: frameid added; frame info added | David Sloman via e-mail |
| 23 Jan 2014 | Unringable added | TimJ (info: Mark Pugh, HDG webmaster) via e-mail |
| 13 Dec 2012 | 1,2: diam added | Chris Pickford via 00010178 |
| 3 Dec 2006 | Tenor is 7-2-11 not 8cwt | Nick Bowden#68 (ex GAD NBR spreadsheets) via e-mail |