1958 Team Signed Braves Baseball

[obcbeatle]

I purchased this ball many years ago on eBay as part of a larger lot of baseball cards/memorabilia. I'm not a ball collector, but I am a Giants/Braves collector. It has been stored in a box with a couple other signed balls in a dark room. I'd like to get it authenticated, but know nothing about submitting balls for auth. I believe it's team signed 1958 ball with a Henry Aaron signature. The Aaron signature is one of the more faded signatures. The ball has no MLB or other branding. I don't presume to know balls or signatures and usually actively stay away from that kind of stuff, for that reason. So given the condition, unknown provenance, and possible scarcity, would you have it graded? If so, what TPG would you send it to for grading? As a card collector, I'm only aware of PSA & SGC. Lastly, how do you display a signed ball given the problems with exposer to light, etc.? Any insight welcome. Thank you.