22 April 2013
- 22:4122:41, 22 April 2013 diff hist 0 SCRAP Humboldt two pendulum harmonograph Update Costs Tag: n
- 22:3922:39, 22 April 2013 diff hist −131 SCRAP Humboldt two pendulum harmonograph →Costs: Update Costs Tag: n
- 22:2322:23, 22 April 2013 diff hist −1 SCRAP Humboldt two pendulum harmonograph →Costs: Update Costs Tag: n