I spoke to seller who has no paperwork but told me a story of how they got it from someone who was a historian employed by the Giants. They also said the historian wanted to remain anonymous, okayyy lol so I passed on it.
I found this one on craiglist seems legit but I'm not familiar with the Giants helmet on the jocktag. What say you my friend?
https://newyork.craigslist.org/brk/clo/d/make-offer-need-gone-ny/6553341691.html