I got this pen for almost nothing about ten years ago on Ebay.
Imprint says: "Made in Canada Parker Vacumatic" with some patent numbers and what I think might be a date code that looks like .o.
Nib says "14K Parker Vacumatic Made in USA" and again patent numbers.
The gold trim is in good condition, no brassing or notable scratches. The filling mechanism works well. The plastic has no transparency that I can see. The problem is the nib. It writes, a semi-flex sort of cursive italic, but it's clearly not factory condition. Under a loupe, I can see that one of the tines is very wavy and the tips don't meet well. (You can sort of see this in the second photo above.)The tipping itself is all but gone. I'm guessing that the nib got dropped and someone tried to fix it, grinding away all the irridium in an attempt to compensate for the tine misalignment they couldn't/didn't address.
I'd like to get this writing again, but I'm not sure how to approach the repair. Replace the nib? Get it retipped or restored? Any advice would be greatly appreciated.