@mauve posts elsewhere:
with three nice big pictures.
Beautiful early 80’s handheld basic computer from Sharp. Same electronics as the 1211, but with a better LCD display that doesn’t decay over time. Sadly, I was told it was working but this is one sick puppy. The keyboard does nothing and the more I inspected it, the worse the symptoms (strange patterns appearing on the LCD). The electronics is split between two boards linked by a row of soldered pins, and my guess is this needs a very good resoldering, which I’m not sure to be able to do. We’ll see. Not all hope is lost.
A commentator notes that the machine has a pair of 4 bit CPUs running at just 256kHz. There’s a service manual here for the very closely related TRS-80 Pocket Computer, and more info on the PC-1210, 1211 and 1212 here.