ok if you've ever seen the nine inch nails closer video there's a brief scene with this mechanical object that has an "eye" on a pole that moves back and forth. I used to think it was just some weird thing made for the video (like the spinning pig head) but the other day I was watching Howl's Moving Castle & the same thing is in the movie! Its in the scene where Sophie is watching Howl sleep in his room. Does anyone know what it is & what it is(or was) used for? 


I was thinking that it reminded me of a metronome but the creepy eye threw me off.
The creepy eye may have some significance (occult or otherwise) which escapes me, but the classic shape of the wooden case is what said "metronome" to me as soon as I saw it. If you pause the vid there, it's quite easy to make out.

