Casio G-Shock "CasiOak" GA-2100-1A1 (All-Black with Blue Accents)
Tool Watch / Digital-Analog Hybrid Sports Watch · Casio Computer Co., Ltd., positioned in the affordable everyday wear and rugged tool watch tier with legendary status for indestructible build quality
Period: Modern Luxury-Adjacent / Contemporary Streetwear (2019-present)
Type
Tool Watch / Digital-Analog Hybrid Sports Watch
Brand
Casio Computer Co., Ltd., positioned in the affordable everyday wear and rugged tool watch tier with legendary status for indestructible build quality
Movement
Casio Quartz Module (Caliber 5611), battery-powered, accurate to +/- 15 seconds per month with a battery life of approximately 3 years on a CR2016 cell
Dimensions
Case diameter 45.4 mm, case thickness 11.8 mm, lug-to-lug distance 48.5 mm, lug width 27 mm tapering into the integrated strap
Description
The Casio G-Shock GA-2100 series, universally nicknamed the CasiOak due to its unmistakable octagonal bezel reminiscent of the iconic Audemars Piguet Royal Oak, has taken the horological world by storm. This specific variant embraces a stealthy all-black aesthetic paired with striking vibrant blue accents on the hands and hour markers. Its surprisingly slim profile makes it one of the most wearable and versatile G-Shocks ever produced, seamlessly bridging the gap between rugged utility and high-fashion streetwear.
Key Features
Carbon Core Guard structure providing extreme shock resistance in a remarkably thin 11.8mm package, iconic octagonal bezel design, hand-retraction feature for unobstructed digital screen viewing, and a sleek stealth colorway highlighted by vibrant blue splashes
Dial Description
Matte black dial featuring a minimalist analog handset with ice-blue or bright cyan accents on the hands and subtle dial markers, complemented by a negative digital LCD sub-display at the 4-5 o'clock position and a day indicator dial hand at the 9 o'clock position
Case Material
Carbon Core Guard structure utilizing black fine resin reinforced with carbon fiber
Crystal Type
Flat mineral glass crystal offering clear visibility and standard scratch resistance
Bezel Details
Fixed octagonal black resin bezel matching the case geometry with molded lettering for G-Shock protection functions
Crown & Pushers
Four recessed stainless steel pushers positioned symmetrically on the sides of the case for mode selection, illumination, adjustment, and start/stop functions
Bracelet or Strap
Integrated black ribbed resin strap secured with a standard black resin pin buckle stamped with the Casio logo
Caseback Details
Solid stainless steel screw-down case back stamped with standard G-Shock module information, water resistance ratings, and manufacturing details
Movement Type
Casio Quartz Module (Caliber 5611), battery-powered, accurate to +/- 15 seconds per month with a battery life of approximately 3 years on a CR2016 cell
Water Resistance
200 meters (20 BAR / 660 feet), suitable for professional marine activity, skin diving, and all forms of swimming and water sports, though not certified for deep saturation diving
Origin & Provenance
Japanese design and engineering, manufactured in Casio-owned production facilities in Thailand or China
Age Estimate
Contemporary production, manufactured circa 2020-present
Cultural Significance
Revolutionized entry-level watch collecting by proving that an affordable resin digital-analog watch could achieve holy-grail hype status among serious collectors and hypebeasts alike
Condition Notes
The watch appears to be in excellent, lightly worn condition with intact matte resin finish, clean crystal, and fully functioning digital and analog displays
Value Estimate
Retail price around $99 to $110 USD, with secondary and retail market values typically holding very steady near MSRP due to high continuous demand
Care & Maintenance
Wash regularly with mild soap and warm water to remove sweat and oils from the resin strap and case; replace the battery every 3 years ensuring the case back gasket is properly lubricated to maintain water resistance
Similar Watches
Casio G-Shock GAB2100 (Bluetooth and Tough Solar variants), standard all-black GA-2100-1A1ER, Audemars Piguet Royal Oak (as the high-end stylistic inspiration)
Interesting Facts
The GA-2100 line was launched in 2019 and quickly became a blank canvas for custom watch modders who install aftermarket metal cases and bracelets to transform it into an affordable metal luxury homage