I suspect it may be an eye dropper. The only way to get ink into it is to unscrew it and pour ink in. I does not seen to have place for an inksak. It does have a gigantic nib, broad italic with a lot of flex and writes like a paintbrush.
Yes it is an eye dropper. You'll want to add a tiny ball o silicon grease to the section threads to help keep it from leaking.
It looks like the front face of the section is chewed up some. Are there any through & through cracks there? If there are you'll need to find a new section. Might be tougher to do.
I'd love to take that beauty for a test ride one day.
Dennis
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Tu ne cede malis sed contra audentior ito ~Yield not to misfortunes, but advance all the more boldly against them