All changes to tower
| Date | Change | Source |
|---|---|---|
| 5 Mar 2010 | Ring as a whole nearer F than G (tenor nominal: F-49c) | Mike Chester (DDA website) via pNBR |
| 1-8: turning, frame id added; frame info added | Mike Chester via 00008500 | |
| 9 Jul 2007 | Thu PN info added | Pauline Boyle via e-mail |