identify, and need any parts from old (ppro?) Unisys tower

A friend of mine put in the dumpster before it goes and old Unisys tower. It is just a chassis. A big 'monster' for what appears to be an ATXish chassis. It has a huge power supply... with 3 connectors similar to ATX but in various sizes. It has 8 removable wide scsi trays and at the top had 3 or 5 5.25" bays and 1 3.5" floppy drive. The P/N within the front drive bay door is 91.58701.029 and the trays are 55.59903.031. I don't know what this is ? tried identifying it online, but no luck. Wonder if this could have been a 6x6 ? (in which case too bad the person he bought the case from gutted it) (he was going to use it for a PC case, but the huge power supply with custom wiring shelved the project for several years and now you can have a storage powerhouse in a smaller than regular ATX tower... so the behemoth went to the dumpster). If anyone can use these trays or power supply (or any other part 4 drive trays, $5 for the power supply... not sure what else anyone could use off it... (front plastic is good except for where someone tried to paint/etc over the Unisys logo). -- Curt