G-Shock Watch GA-100BW-1A Black White
This new series brings a fashionable black and white theme to the popular G-Shock
GA-100BW-1A case. This model features 200 Meter Water Resistance, Magnetic Resistance and a Stopwatch, which makes this watch as functional as it is fashionable.
The first G-Shock, the Casio DW-5000C, was designed in 1983 by an engineer working for Casio named Kikuo Ibe.
It was designed to have a 10-year battery life, be water resistant to 10 bar, and survive a 10m fall onto a hard surface.
200 prototypes were tested by dropping them from rooftops or third story windows