@CPA
Authentication is always a good idea for peace of mind.
Disclaimer: I only own H exotic bracelets (no bags). I was previously doing research on the H forum regarding matte vs shiny alligator/croc though when I was seriously considering a Himalayan. The recurring theme was that with frequent handling, matte turns shiny and cannot be refurbished; however, shiny could become more matte but could be refurbished back to shiny. Refurbish = H spa. I’m not sure if the same principles apply to LV exotics, but I can’t possibly see why not.
I personally would keep it assuming it’s authentic. I don’t see this piece being utilized on a frequent basis to cause any significant damage or skin changes, especially since you already have a nice collection of these trunks to rotate through.
Good luck!