All changes to tower
| Date | Change | Source |
|---|---|---|
| 17 Jan 2026 | Transfer and augmentation events updated. | RW 3637 |
| 22 Mar 2020 | 1-12,2#: frameid added; frame Fr1 added | Tim Jackson via e-mail |
| 14 Mar 2020 | 1-4,2# turning added | Tim Jackson via e-mail |
| 20 Apr 2019 | Sct: nominal added,note amended | Chris Pickford via 00013385 |
| 16 Dec 2012 | Sct: historically important, founder amended | Philip Denton via e-mail |
| 22 Nov 2005 | Tenor nominal added (=E-17c) | Andrew Higson via e-mail |