I have one AT&T 1600/6250 in a rackable case (no rails.) There is no
obvious model # but it's an HP rebadge, likely of the 88780. It has
the Pertec (non-SCSI) interface so it's of limited use to me but may
be a good fit for a minicomputer. Other than powering up, I haven't
tested it, having no suitable interface, but it looks clean. If I
have time I may be able to run a blank tape through its self-test
routines.
Pickup is in the NW Chicago suburbs (60070.) If you're coming in for
VCFMW, that would be a perfect time. It's a bit heavy to bring down
to the show but home is not too far from the venue.
-j