GW-M5610U-1B Solar Watch

The square that sets and charges itself.

Casio's classic square with the two upgrades that end watch maintenance: Tough Solar charging from any light, and Multi-Band 6 radio sync that corrects the time nightly against atomic clock signals. The 2021 U revision swapped the old EL panel for a brighter LED backlight. Shock resistant, 200 meters water resistant, same 5600 silhouette since 1983.