Casio G-Shock “Mini CasiOak” GMA-S2100-4A Unisex | Slim Octagonal Watch with Carbon Frame (Carbon Core Guard, 42.9 mm, 200 m)

Professional Description

The Casio G-Shock GMA-S2100-4A, known internationally by the watch community as the “Mini CasiOak”, brings the acclaimed octagonal geometric design of the 2100 series to a compact, sleek, and ergonomic scale. Designed with a distinctly unisex aesthetic, this model reduces the case dimensions to 42.9 mm in width and a record-breaking thickness of just 11.2 mm, making it one of the thinnest and most comfortable watches in the entire history of G-Shock.

Its construction makes no compromises on ruggedness: it incorporates the innovative Carbon Core Guard structure, which encapsulates the internal module in a high-density carbon-fiber-reinforced resin case, maintaining the brand’s legendary shock resistance while weighing a mere 41 grams. With a monochromatic finish in a soft pastel pink shade (blush pink) and satin-finished hour markers, it combines urban minimalism, contemporary elegance, and professional water resistance of 200 meters (20 bar).

Key Features

• Iconic “Mini CasiOak” Silhouette: Iconic, geometrically inspired octagonal bezel, reinterpreted in a low-profile design ideal for medium or slim wrists and for comfortable wear under tight cuffs.
• Carbon Core Guard Structure: Carbon-fiber-reinforced inner case that provides outstanding structural rigidity against impacts, vibrations, and mechanical torsion.
• Ultra-Thin Design and Featherweight: At just 11.2 mm thick and weighing a total of 41 grams, it offers a virtually imperceptible wearing experience on the wrist all day long.
• Water Resistance to 200 Meters (20 ATM): Absolute professional-grade water resistance suitable for intensive swimming, high-impact water sports, and recreational diving.
• Super Illuminator Dual Lighting: Features two independent high-intensity LEDs: one to illuminate the analog dial and a dedicated backlight for the digital LCD display.
• Automatic Hand Shift (Hand Shift): Allows you to momentarily move the hands with the press of a button to keep the digital display completely unobstructed while reading data.

Technical Specifications

Component / Feature Technical Detail
Brand and Collection Casio G-Shock (GMA-S2100 “Mini CasiOak” Series)
Reference / Model GMA-S2100-4A (Pastel Pink / Blush)
Movement Casio Analog-Digital Quartz
Case Carbon Core Guard (Carbon-fiber-reinforced resin)
Case Dimensions 46.2 mm × 42.9 mm × 11.2 mm
Total Weight 41 g (ultra-lightweight)
Crystal Hardened, scratch-resistant mineral glass
Strap Highly durable, matte, flexible resin with buckle clasp
Water Resistance 200 meters (20 ATM / 20 Bar)
Power Source: 2 SR726W button-cell batteries (approx. 3-year battery life)
Accuracy: ±15 seconds per month (at normal room temperature)

Dial Functions and Operational Performance

• World Time: Covers 31 time zones (48 major cities worldwide + UTC) with daylight saving time (DST) on/off.
• Precision Timekeeping: 1/100-second stopwatch for the first 60 minutes (and 1-second intervals up to 24 hours), with elapsed time, split times, and records for 1st and 2nd positions.
• Countdown Timer: Adjustable from 1 second to 24 hours for workouts and time tracking.
• Alarm System: 5 independent daily alarms with a configurable hourly chime.
• Neobrite Luminiscence: Photoluminescent coating on the main hands for quick readability after brief exposure to light.
• Full Perpetual Calendar: Native automatic programming that accurately manages dates, days of the week, and leap years through the year 2099.