Canon LX-40

The Canon LX-40 looks different compared to its sibblings like the LC-8M and the LC-31. We don't know the meaning of the LX-abbreviation, most likely is eXperimental.Compared with all other known Canon calculators this one seems to be heavily inspired by some elder Sharp products. Instead of using a traditional printed circuit board (PCB) the LX-40 uses a flexible foil pressed against a heavy metal sheet. Not only the LC-display but even the calculator circuit missed any solder joint.