As promised to the folks over in the fediverse, here it is. The Windows NT 5.0 disc that I found at Goodwill. As far as I can tell, It's probably just a normal copy of Build 1592 as far as the ISO is concerned, but it's still a curious find.

I've also included an already installed VM image because of the difficulty I had in getting it installed. QEMU just crashed, Virtualbox hung on the second stage of installation, and VMWare Player wouldn't boot after the first stage, so I ended up having to do the first stage in Virtualbox, shut the machine down after that finished, then boot it back up in VMWare to actually finish installation. That said, this finished image should boot just fine in Virtualbox (it did for me, at least).

So, there you go, the Goodwill find beta copy of Windows NT 5.0. Enjoy!