All changes to tower
| Date | Change | Source |
|---|---|---|
| 9 Dec 2017 | 1-8: frameid added; frame info added | John Baldwin via database |
| 11 May 2009 | 1-7: nominal added; 8: nominal revised | Andrew Higson via 00007426 |
| 31 Jan 2007 | Tenor nominal added (F+28c) | Andrew Higson via pNBR |