All changes to tower
| Date | Change | Source |
|---|---|---|
| 23 Apr 2020 | 1-5: (app)wt added | Tim Jackson via e-mail |
| 27 May 2018 | Precise tenor wt supplied (rather than ~10cwt) | Edward Cribley (per GAD Naylor Vickers' list) via pNBR |
| 6: wt amended; fr1,fr2: material amended | Edward Cribley via 00012884 | |
| 22 Jul 2015 | 4,6: frameid amended; fr2: added; fr1: material amended | Tim Jackson via 00011274 |
| 18 May 2003 | Note not G but F#-10cents (735.6Hz) | Bill Hibbert via e-mail |