I don't know the details. It's new and unused, but it seems to be from a previous era. There is a dot between the 3rd and 4th digits. Please check the images. This calculator has a strong presence. It will be shipped via post. Skeleton desktop calculator The power source is a combination of battery and solar, so it can be used even without batteries. 8 digits. Height: 20cm Width: 15cm Retro Showa Clear Vintage