Thanks Hap. It is in pristine condition and I'm pretty sure it's never been opened.
I appreciate the help archer174. After trying a few things to try to get the original drive to boot properly, I gave up and installed another hard drive and did a fresh install of NeXTstep 3.3. This allowed me to preserve the original drive as it was.
It had four user accounts and some office software (Improv, WordPerfect) and documents that had been created by the users. Seems overkill for the era just to do that but it's a fantastic machine and is the new king of my NeXT computers. I was very fortunate with this one.