Up for sale we have a very rare Casio Cl-301 calculator watch.  This has a 243 module that works perfect and produced in 1983. All functions do work. This is by far the hardest Casio Calculator watch to find from that era. I had bought many old NOS Casio's years ago from a closed watch shop and found a few that I did not know I had still. It does not have a rechargeable battery in it at this time. I wore this one less than a handful on times. I will double box this so no damage occurs. If you need more information just ask.