All changes to tower
| Date | Change | Source |
|---|---|---|
| 20 Jun 2018 | 1-3: turning added; frame: date,maker added | Matthew Higby via 00012929 |
| 12 Feb 2018 | 1-3: frameid added; frame info added | Mike Chester via 00012761 |
| 5 Oct 2004 | Tenor nominal added | David Kelly via e-mail |