All changes to tower
| Date | Change | Source |
|---|---|---|
| 17 Sep 2017 | frame: truss,layout added | Mike Chester via e-mail |
| 28 Dec 2011 | 3-6: turning added; 1-6: frameid added; frame info added | John Baldwin via database |
| 5 Oct 2004 | Tenor nominal added | David Kelly via e-mail |