Vintage T-Shirt Forum & Community Authentication Appraisals

I can’t for the life of me find any information or images of this t-shirt. I picked it up at a car boot/garage sale and now I’m really curious about it. It’s a red King Crimson t-shirt from the 1981 Discipline tour, specifically from the Halloween show at Carnegie Mellon University. Do you think this was general merch sold at the gig, or could it have been a crew t-shirt? Any help would be appreciated!

Beauty! It's the concert staff's tee. I can't find a match for it. Probably $200+. It's not a boot, per se, as I've seen others comment on Reddit. The promoters would celebrate the gigs they did and sometimes put together their own tees, limited run for employees. And the bands, we're okay with it, unlike the bootleggers in the parking lots.