All changes to tower
| Date | Change | Source |
|---|---|---|
| 11 Aug 2015 | 1-6: nominal added; 1: wt amended | [Alan Hughes] via e-mail |
| 12 Jan 2012 | 2-5: (app) wt added; 1-6: frame id added; frame info added | John Baldwin via database |
| 5 Nov 2009 | 1-6: diam added; 1: wt,date, fdr, canon info added | [George Massey] via e-mail |