All changes to tower
| Date | Change | Source |
|---|---|---|
| 7 Dec 2017 | Flag added: Greenwood shows tenor as 9-1-5; cf Edns 1-10 | Dove editions 1 to 10 via JCB |
| fr1: date amended | John Baldwin via database | |
| 1 Jun 2011 | 1-6: canons,turning,frameid added; frame info added | Andrew Higson via 00009378 |