This is a very old rack mount disk controller (has format switch) with what
looks like ims on the 15 or so small boards. The backplane has DYNATECH on
the back.
Two Unisys PCK105-SKB look unused, but one is yellowed.
DATAMYTE 1000 Data Collector
EECO model # TRS9200BBDED, paper tape reader, no reels. The TRS9200 is on
Bitsavers.org