All changes to tower
| Date | Change | Source |
|---|---|---|
| 13 Feb 2017 | frame: maker added | David Sloman via e-mail |
| 12 Feb 2017 | 1-6: turning,frameid added; frame info added | Mike Chester via e-mail |
| 10 Jun 2009 | Tue PN info added | Anthony Cotton: DDA Annual Report via e-mail |
| 6 May 2004 | Tenor nominal supplied | George Dawson via e-mail |