The Kisai Keisan Uses Vertical Addition to Tell Time

 - Jan 22, 2009
References: tokyoflash
Tokyoflash released its newest watch today which just may be one in a line of hardly any that is easy to read!

The Kisai Keisan has a curvy frame and uses a rippled convex lens that magnifies the lighting effect from the LEDs behind the numbers in the watch face.

Although this timepiece may take a bit of time to get used to compared to some of the other watches in the Tokyoflash line, getting the hang of the Kisai is fairly simple. To reveal the time or date, simply add the numbers vertically in the columns of each of the four rows.

These retail for approximately $225 USD and can be bought online from the Tokyoflash website.