The Casio G-Shock GA-2100-1A1, known by enthusiasts as the “CasiOak,” combines the legendary durability of G-Shock with a sleek octagonal bezel inspired by iconic luxury sports watch designs. Its stealth black colorway and minimalist dial create a modern appearance that works equally well in casual, outdoor, and everyday settings. Built around Casio’s Carbon Core Guard structure, the GA-2100 delivers exceptional strength while maintaining a lightweight and comfortable profile. The analog-digital display provides world time, stopwatch, countdown timer, multiple alarms, calendar functions, and LED illumination. With 200-meter water resistance and G-Shock shock protection, this watch is designed to handle demanding daily wear. This is a brand new and unworn unit. Includes the original Casio packaging, user manual, and warranty card shown in the photographs. All functions operate properly and the watch presents exceptionally well.