Yes, another calculator showed up at home. This time it is a pocket device called Canon Palmtronic 8,
also known as LD-84. It works off 2xAA batteries and has 8 digits shown
on a VFD display. It also accepts an external 3Vdc power source.
This one did not need any restoration, except for some light cleaning of the plastic case.
The rightmost digit is slightly fainter than others because obviously it has been "on" longer than other segments.
What else? The weight is just fine, and those two batteries account for lots of it!