Casio Z-1 GR Contrast?

[xerxes]

I would recommend to find a Z-1GRA or FX-890P. The contrast is much better than the Z-1 or Z-1GR. It's comparable to the high contrast LCD of the PC-E500S. The reference GRA is not written on the calculator, only on the box: https://casio.ledudu.com/pockets.asp?type=2174&lg=eng