Thank you all for your help!
The part with the handle and nut does come off but you can't see anything inside, it's just empty. It is some sort of sprayer nozzle.
It looks like a christmas light.. it has a tiny hole in the end. The wooden piece unscrews but doesn't seem to have a purpose. Here are a few more...
Does anyone know what this is? There are no markings whatsoever. Thank you!
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