Advice on these signed balls (old timers day? 70-73?)

[Enternal]

Hi everyone, I was looking for advice on these baseballs I picked up at an storage unit sale.

These are the first signed balls that I have owned, at first I thought what a shame that people used pencil and pen, then after digging around on here, I realized the autographs were faded. Both baseballs look to contain the same autographs.

Pictures here, I tried to link them but they were huge and I didn't know how to resize them for this post.
https://imgur.com/a/1ijZ60U

The ones I can read

Mike Garbark
Enos Slaughter
Moose Skowron
Franke Torre
Del Crandall

Im guessing it came from maybe this event? Although the ball brand is different. Which means among the faded autos are Mantle, Eddie Matthews and other hof players.

https://sports.ha.com/itm/baseball-c.../50013-57499.s


I read that maybe JSA can use a light to authenticate the faded autographs but would it be worth it? Anything that I can do to see read the faded signatures? I was thinking about keeping one and selling the other but if both balls are likely to fade over time maybe I should sell both? All the rest of my autos are on cards and comics.


Thanks for your time, and thanks to Leon for giving me access so I could ask these questions.