Upgrade the beloved retro look with the octagonal GA-2100 line, which combines the design concept of the very first G-Shock with Smartphone Link and Tough Solar. To do this, it uses the Carbon Core Guard structure to offer a similar fit on the wrist as the original model. The double-layer dial design emphasises the dimensionality of the LCD display and recessed dial. Attention to detail adds texture, especially with the various surface treatments applied to the dial and the recessed dial.