Recording Drums

I have three good drums which are installed in the three thermo-hygrographs. The drum in the meteorograph tends to stall and all of the drums here have bad springs.

Up to: OTA

Images

	large
	small The brass base (at the bottom of the drum) is unusual.
	small-u-underside It is not flat like the drums in the thermo-hygrographs and meteorograph. I do not know what this sort of drum goes in. This one has both gears installed so they don't get lost. They are different from the gears on the flat-bottom drums.
	small One unusual and one normal drum
	clockwork The inside of the drum.
	going barrel Three bad mainsprings (going barrel type). These appear to have broken (the key just turns freely).
	balance spring This balance spring looks fine, but its actually broken. The spring wobbles and it jams. There are another two that have been completely dismantled and have wrecked springs.