All changes to tower
| Date | Change | Source |
|---|---|---|
| 1 Mar 2020 | fr1: details added | John Baldwin via database |
| 8 Jul 2009 | all: frameid,canon info added; 1-7: nominal added | Andrew Higson via 00007714 |
| 20 May 2006 | Tenor nominal added (F#-16c) | Andrew Bull (info: JT&Co) via pNBR |