The Canon Palmtronic 8, also known as the LD-84 is a fine little mid-1970s Japanese calculator with a VFD (vacuum fluorescent) display. The calculator has a TI TMS0855NL (7632) microprocessor and supports the four basic arithmetic functions as well as square roots and percentages.
My one still works OK and is in reasonably good condition for something that is now fifty years old, though it is a little scuffed (arn't we all?) Some of the keys are a little stiff and sometimes do not register.