All changes to tower
| Date | Change | Source |
|---|---|---|
| 13 Sep 2013 | fr: historically important added | Philip Denton via e-mail |
| 24 Sep 2011 | 1-5: nominal added; all: canons, turning, frame id added; | Chris Pickford via 00009695 |
| 1,4: diam amended; frame info added | Chris Pickford via 00009695 |