CASIO G-SHOCK GA-2100RRB-4ADR ICONIC RED 2100 ANALOG-DIGITAL WATCH

The GA-2100RRB-4ADR is the GA-2100 in G-Shock's brand red — part of the Iconic Red series that puts four of G-Shock's most recognisable silhouettes in a vivid, head-to-toe red colourway. The dial is treated with red vapor deposition so the face blends seamlessly into the red bezel and band rather than sitting as a separate element — the entire watch reads as one unified red object. An inverted (negative) LCD and black accent details cut through the red for readability and to convey the tough G-Shock identity. Bio-based resin for the bezel and band.

Module 5611 is the same GA-2100 platform: analog-digital with two hands and a day sub-dial, hand shift, world time across 31 time zones (48 cities), 1/100-second stopwatch with split time, 24-hour countdown timer, five daily alarms, double LED Super Illuminator, Neobrite lume, Carbon Core Guard, and a full auto-calendar to 2099. At 48.5 × 45.4 × 11.8 mm and 51 grams — the same ultra-light, slim octagonal profile. Shock resistant, 200-metre water resistant. SR726W × 2, approximately three-year battery life.

At a Glance

Why You'll Love It

• The red vapor deposition dial is what makes the Iconic Red treatment different from a standard red G-Shock. The metallic red coating on the dial blends the face seamlessly into the red bezel and band — there's no visible boundary between case and dial. The entire watch reads as a single, continuous red surface with black accents and an inverted LCD floating within it. The textural contrast between the matte resin exterior and the metallic vapor-deposited dial adds depth and sophistication to a bold colour statement.
• Red is G-Shock's brand colour — the colour of intensity, energy, and toughness. The Iconic Red series puts it on the four most important G-Shock silhouettes (5600, 6900, 110, and 2100), and the 2100 is the slimmest and most streamlined of the four. If you want G-Shock brand red in the most wearable, most contemporary form factor, this is it.
• The inverted LCD (light digits on dark background) creates sharp contrast against the red case — the dark display window and black accent details anchor the design and prevent the all-red colourway from becoming overwhelming. The black is the structural framework; the red is the energy.
• Bio-based resin derived from corn is used for the bezel and band — the same sustainability-conscious material used across recent G-Shock releases. The red dye works with the bio-based resin to produce a vivid, saturated colour.
• At 51 grams and 11.8 mm thin, the GA-2100RRB is a bold colour statement in a lightweight, slim package. The red is loud, but the watch itself sits flat and light on the wrist — it's a statement without being a burden.
• Full Module 5611 functionality: hand shift, world time (48 cities), double LED Super Illuminator, five daily alarms, Carbon Core Guard, 200m water resistance. The colour treatment doesn't change the spec sheet.

Perfect For

Key Features

• All-red with vapor deposition dial — Red vapor deposition on the dial face blends seamlessly into the red bezel and band. Unified red surface with black accents and inverted LCD.
• Inverted (negative) LCD — Light digits on dark background. Sharp contrast against the vivid red case for readability.
• Ultra-light — 51 g, 11.8 mm — Carbon Core Guard bio-based resin construction. Bold colour in a slim, lightweight package.
• Hand shift + Double LED Super Illuminator — Hands retract for clear digital reading. Separate LEDs for face and digital display.
• World time — 31 time zones (48 cities + UTC) — With daylight saving on/off switching.
• 200-metre water resistance (20 BAR) — Suitable for swimming, snorkelling, and recreational water sports.

Technical Specifications

Best Matched With

Frequently Asked Questions

Why Buy from City Chain Singapore