All changes to tower
| Date | Change | Source |
|---|---|---|
| 3 Jul 2022 | Frame Fr1: layout amended | |
| 24 Jan 2020 | Ring key is nearer F# (despite tenor nominal of F+44c) S | TimJ (#261) via e-mail |
| 1-6: note amended | Tim Jackson via e-mail | |
| 28 Dec 2019 | 1-6: nominal added | Bill Hibbert via e-mail |
| 21 Dec 2010 | 1-6: frameid, canon status added; frame info added | Chris Pickford via 00009014 |