I bought this item for few $$ couple of weeks back. Its a Desktop Digital Multimeter. It may very old but still in working condition.
Some General Description according to the Product user manuel.
This instrument is a mains operated, high performance autoranging multimeter providing 5½ digit resolution (± 210000 counts) switchable to 4½ digits (± 21000 counts) for a higher reading rate. It has a 7-segment l.e.d. display coupled with l.e.d. annunciators for displayed units and instrument status.