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I see where's there is a GONDA Metal Co. located in Japan (established 1918). Maybe they provided the raw product cylinder and another company built their product utilizing it. But what is it?
Looks like a lead bar for soldering.
Is there visible evidence of a broken off threaded stud that I havepointed out in the attached screen capture? The photo isn't clear on my cell but I can add my guess as an arrow point or soldering iron tip.