All changes to tower
| Date | Change | Source |
|---|---|---|
| 10 Sep 2024 | PN deleted | SGR website via Oliver Lee |
| 13 Aug 2022 | Fr1: layout amended | Ranald Clouston papers via Neal Dodge |
| 21 Apr 2017 | all: turning,frameid added; Sct: nominal,canon info added; | Philip Denton via 00012092 |
| frame info added | Philip Denton via 00012092 | |
| 23 Nov 2006 | Tenor nominal added (Db+27c) | Andrew Higson via pNBR |