All changes to tower
| Date | Change | Source |
|---|---|---|
| 13 Jan 2024 | 3: cast year added | See CB Sheffield Dio, Dawson via Tim Jackson |
| 8 Jul 2016 | 1,2,3: frameid added; frame info added | David Sloman via e-mail |
| 10 Mar 2008 | Tenor wt not approx; tenor note added | Andrew Higson via pNBR |