Casio G-SHOCK Watch GA-2100LXB-1A9ER

Introducing the Casio G-SHOCK GA-2100LXB-1A9ER, a version of the iconic GA-2100 that trades pure stealth for a bold contrast between matte black and radiant gold. The octagonal matte black resin case, with its signature crown guards, frames a fine grid-textured black dial where twelve rectangular gold-toned indices and wide cream-colored hands with green luminescent fill create instant legibility and a premium sporting aesthetic in equal measure.

The smooth black bezel transitions into an inner minute track ring where the gold indices anchor the dial visually. At nine o'clock, a circular black subdial tracks the day of the week via a dedicated analog hand. To the right, the liquid crystal digital display presents the second time zone in the upper window alongside DST and HND indicators, while the lower section shows running seconds and the MUTE, ALM and SIG function indicators at the bottom. The integrated black resin strap, with parallel rib relief and uniform matte finish, completes a coherent and robust package.

Inside runs the Casio module 5611, an analog-digital caliber offering world time across 31 time zones and 48 reference cities, a 1/100-second chronograph up to 24 hours, programmable countdown timer, five daily alarms, auto calendar, and hourly time signal. The LED illuminates both the hands and the digital display with a single button press. The Carbon Core Guard structure protects the module with an inner carbon shell that cuts weight without sacrificing shock resistance. Water resistance is certified to 200 metres.

G-SHOCK was born in 1983 when Casio engineer Kikuo Ibe set out to build the unbreakable watch. After months of failed prototypes, the solution was a floating module structure that isolates the movement from external impact. The ultimate test was dropping the prototype from the fourth floor of a building. Four decades on, G-SHOCK remains the global reference in high-resistance timekeeping, with the GA-2100 among its most recognized silhouettes worldwide, thanks to its flat octagonal profile and integrated strap.

Shopping at TicTacArea.com means buying from real jewelers with over 30 years of industry experience, serving as official distributors, online since 1999. Every product is genuine, factory-new, and delivered with its official presentation box, documentation, and international warranty.

Technical Specifications

Reference: GA-2100LXB-1A9ER
Module/Caliber: 5611
Type: Analog-Digital
Movement: Quartz
Water Resistance: 200 m
Shock Resistance: Yes, Carbon Core Guard structure
Case Material: Resin
Case Color: Matte black
Strap Material: Resin
Strap Color: Matte black
Dial Color: Black with gold indices
Crystal: Mineral
Illumination: LED (dial and display)
Dimensions: 45.4 x 48.5 mm
Thickness: 11.8 mm
Weight: 51.0 g
Functions: World time (31 zones / 48 cities), 1/100-sec chronograph up to 24 h, countdown timer, 5 alarms, hourly time signal, auto calendar, DST indicator, HND (hand concealment) function
Battery: CR2016
Made for: Men

User manual

Download the manual in English (PDF)