All changes to tower
| Date | Change | Source |
|---|---|---|
| 10 Mar 2020 | Tenor note is not B (nominal C-41Hz) S | Chris Pickford (pNBR13643) via pNBR |
| 1-4: nominal added,note amended; 2: (app)wt added; | Chris Pickford via 00013643 | |
| fr1: maker added | Chris Pickford via 00013643 | |
| 11 Nov 2016 | 1-4: frameid added; frame info added | John Baldwin via database |
| 20 Nov 2012 | URL added | Tower website via www |
| 19 Feb 2012 | 4: historically important | David Knight via e-mail |
| 17 Jan 2005 | u/r added | Chris Higgins (via Graham Nabb) via e-mail |