That's awesome! Been hunting since 2010 and I'm still waiting for my first proof Ben. I've found multiple proof 40% halves and even a 1982s silver proof GW commemorative though. Hope you're able to push through the solid boxes and keep getting the good stuff.
Hh
Buff
Thanks BuffaloBoy
This box was a very promising sign.
Unrolling a roll and seeing that thick shiny silver rim is a whole new WOW factor. I hope you find one soon.
HH