Gaffer, it IS a 1970s clock. It’s a late 1970s or early 1980s Micronta (Radio Shack) alarm clock!
Other reports said it was a Honeywell Alarm demonstrator kit.
I followed a couple of links and this one explains what it most likely is. Indeed, probably an 80s Radio Shack clock taken apart and put in a briefcase. Why?
Regardless, my bad. A clunky large mess of boards and wires that could be replaced by a much smaller clock kit board from Amazon for $20 that would fit in a real lunch box and still leave room for a couple pounds of malleable substance.
But the question now is why reinstall the guts of an alarm clock in a briefcase? Also, not easily seen in the photograph is a battery backup 9V connector.