Dana Industries Digital Multimeter Model 5900-- great reputation for accuracy and workhorse status.
This unit was MADE IN THE USA. They don't make them like this anymore, certainly not in CHINA!
My company bought this unit used in 2011, had it NIST-calibrated in 2012, and for the most part this unit has been in storage ever since. I have not recently tested it but it powers on and has been carefully stored.
This vintage unit is in great shape for being manufactured in the mid-70s.
Dimensions are approximately 16" x 17" x 3.5".