Showa Retro Check Writer Uchida Yoko P-8N

Stored in a warehouse and unused for a long time.
We don't know the exact usage duration or condition as the previous user is no longer available. The ink seems to have separated when I tried to dispense some.
The box is missing its top.
It currently operates, but I'm unsure if its movement is normal.
I felt it would be a waste to discard it, so I've decided to list it.
Thank you for your consideration.