Casio G-Shock GA-2100K-2ADR blue neon accents piano black Carbon Core 200m
Casio GA-2100K-2ADR translucent matte finish music-inspired nightlife
CASIO G-SHOCK GA-2100K-2ADR 2100 ANALOG-DIGITAL TRANSLUCENT SMOKY BLUE WATCH
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Casio GA-2100K-2ADR late-night music scene culture lifestyle

CASIO G-SHOCK GA-2100K-2ADR 2100 ANALOG-DIGITAL TRANSLUCENT SMOKY BLUE WATCH

GA-2100K-2ADR

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  • 1 Year Warranty

The GA-2100K-2ADR is the smoky blue variant of the nightlife-inspired GA-2100K — the coolest-toned and most futuristic of the three K-series colourways. Translucent blue resin with a matte fog finish across the bezel and band creates a hazy, atmospheric quality that evokes the blue-shifted lighting of late-night venues — laser beams cutting through smoke, neon reflecting off dark surfaces. The smoky blue case partially reveals the internal Carbon Core Guard structure through the semi-transparent material, and neon accent details provide sharp colour points against the cool haze. A newly developed smooth dial surface with piano-black gloss anchors the face.

Module 5611 is identical across all GA-2100K variants and the broader GA-2100 range: 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. Shock resistant, 200-metre water resistant. SR726W × 2, approximately three-year battery life.

At a Glance

Case & BezelCarbon / Resin — Translucent Smoky Blue, Matte Finish
BandTranslucent Resin — Smoky Blue, Matte Finish
Dial FinishNewly Developed Smooth Surface — Piano Black Gloss
AccentsNeon Colour — Laser-Light Effect
ConstructionShock Resistant · Carbon Core Guard
DisplayAnalog-Digital (2 Hands + Day Sub-Dial + LCD)
Hand ShiftYes
LightDouble LED Super Illuminator (Face + Digital)
Module5611
Case Size48.5 × 45.4 × 11.8 mm
Weight51 g
Collection2100 Series — Nightlife

Why You'll Love It

  • The smoky blue is the most futuristic of the three GA-2100K colourways. Blue-haze translucent resin with a matte fog finish reads as cyberpunk, sci-fi, and neon-lit — it's the colour temperature of blue laser light in a dark club, or neon signs reflected in wet asphalt. Where the amber K-5A is warm and atmospheric, the blue K-2A is cool and electric. This is the nightlife variant that leans hardest into the futuristic side of the concept.
  • The matte fog finish on the translucent blue bezel and band diffuses light across the surface — creating a frosted, hazy quality rather than sharp transparency. Through the smoky blue material, the Carbon Core Guard structure and internal components are partially visible, adding mechanical depth to the cool-toned exterior.
  • The piano-black glossy dial provides a reflective dark centre behind the analog hands — the same newly developed smooth surface used across all three K-series variants. The deep black creates a striking contrast against the cool blue translucent bezel, with neon accent details sparking between the two like laser strobes.
  • At 51 grams and 11.8 mm thin, the GA-2100K is built for extended wear — nights out, festivals, travel. No wrist fatigue, no sleeve snagging. The ultra-light resin construction with Carbon Core Guard delivers G-Shock toughness without the weight.
  • Full Module 5611 functionality: hand shift, world time (48 cities), double LED Super Illuminator, five daily alarms, 1/100-second stopwatch with split time, 24-hour countdown timer. The nightlife exterior doesn't compromise the spec sheet.
  • 200-metre water resistance and shock resistance. Whether it's rain at a festival, a drink spill at a club, or a bump in a crowd, the GA-2100K handles it without concern.

Perfect For

Nightlife Music Festivals Streetwear Everyday Wear Urban Style Swimming & Water Sports Gift

Key Features

  • Translucent smoky blue — matte fog finish — Semi-transparent blue bezel and band with matte haze texture. Partially reveals internal structure. The coolest-toned, most futuristic K-series variant.
  • Piano-black dial — Newly developed smooth glossy surface with deep reflective black. High contrast against the blue translucent bezel.
  • Neon laser-light accents — Bright neon colour details against the smoky blue body. Laser-strobe aesthetic.
  • Ultra-light — 51 g, 11.8 mm — Carbon Core Guard resin construction. Comfortable for all-night wear.
  • Hand shift + Double LED Super Illuminator — Hands retract for clear digital reading. Separate LEDs for face and digital display.
  • 200-metre water resistance (20 BAR) — Suitable for swimming, snorkelling, and recreational water sports.

Technical Specifications

The GA-2100K-2ADR is a G-Shock 2100 Series analog-digital watch running Module 5611. It features a translucent smoky blue resin case and band with matte fog finish, piano-black glossy dial, neon accents, Carbon Core Guard, hand shift, double LED Super Illuminator, world time (48 cities), and 200-metre water resistance. Case dimensions are 48.5 × 45.4 × 11.8 mm at 51 g with approximately 3-year battery life on SR726W × 2.
Case & Build
Model Number GA-2100K-2ADR
Module 5611
Case Material Carbon / Resin
Bezel Translucent Smoky Blue Resin — Matte Finish
Dial Piano-Black Gloss (Newly Developed Smooth Surface)
Construction Shock Resistant, Carbon Core Guard
Glass Mineral Glass
Case Size (L × W × H) 48.5 × 45.4 × 11.8 mm
Weight 51 g
Water Resistance 200 Metres (20 BAR)
Band
Material Resin — Translucent Smoky Blue, Matte Finish
Wrist Size 145 – 215 mm
Clasp Tang Buckle
Movement & Power
Movement Type Quartz Analog-Digital
Analog Display 2 hands (Hour, Minute — moves every 20 seconds), 1 sub-dial (Day)
Digital Display Hour, Minute, Second, AM/PM, Month, Date
Hand Shift Yes — hands retract for unobstructed digital view
Accuracy ±15 seconds per month
Battery SR726W × 2
Battery Life Approx. 3 years
Display & Light
Lume Neobrite
Backlight Double LED Super Illuminator (Face + Digital, separate LEDs)
Illumination Duration Selectable 1.5s or 3s, afterglow
LED Colour White
Functions
World Time 31 time zones (48 cities + UTC), DST on/off
Stopwatch 1/100-second (first 60 min) / 1-second (after 60 min), 24-hour capacity; elapsed, split, 1st–2nd place
Countdown Timer 1-second unit, 1 sec – 24 hours
Alarm 5 daily alarms + hourly time signal
Calendar Full auto-calendar to 2099
Time Format 12/24-hour
Mute Button tone on/off

Best Matched With

Neon Accessories Black Tee Dark Denim Club Wear Cyberpunk Layers Festival Outfit Chunky Sneakers

Frequently Asked Questions

Which GA-2100K colour should I pick?
Three nightlife-themed variants with identical Module 5611 specs. The GA-2100K-2A (this model, smoky blue translucent) is the coolest-toned and most futuristic — blue laser-light energy for a cyberpunk edge. The GA-2100K-5A (smoky amber translucent) is the warmest — references whisky-bar lighting and warm stage glow. The GA-2100K-1A (smoky black translucent) is the most stealth — dark haze that disappears into nighttime outfits. All share the same piano-black dial and fog-machine matte texture.
What is the piano-black dial?
A newly developed smooth glossy dial surface specific to the GA-2100K series. The finish has a deep, reflective quality that creates a mirror-like centre behind the analog hands. On the blue K-2A, the high-contrast pairing of glossy black dial against cool blue translucent bezel is particularly striking.
Is the watch fully transparent?
Semi-transparent — the matte finish creates a foggy, hazy quality rather than crystal-clear transparency. The effect is closer to frosted glass than clear glass. Internal structure is partially visible through the smoky blue resin.
Will the translucent blue discolour over time?
Translucent resin can develop slight discolouration over years of heavy UV exposure and contact with certain chemicals (sunscreen, insect repellent). Under normal daily wear it holds its colour well. Store out of direct sunlight when not wearing and rinse after exposure to chlorine or saltwater.
Is this watch suitable for swimming?
Yes. With 200-metre (20 BAR) water resistance, the GA-2100K-2ADR handles swimming, snorkelling, and recreational water sports. Not rated for scuba diving with air tanks.
What warranty does this watch come with?
The GA-2100K-2ADR comes with Casio's official warranty when purchased from City Chain Singapore, an authorised Casio retailer.

Why Buy from City Chain Singapore

Authorised Retailer Official Casio warranty
100% Authentic Genuine Casio product
Free Shipping Within Singapore

Extra $8 OFF with min. $88 spend
Use Code: NDP8

Extra $30 OFF with min. $610 spend
Use Code: NDP30

Extra $61 OFF with min. $1000 spend
Use Code: NDP61

Case size (L× W× H): 48.5 × 45.4 × 11.8 mm
Weight: 51 g
Case and bezel material: Carbon / Resin 
Resin Band
Mineral Glass
Shock Resistant
Carbon Core Guard structure
200-meter water resistance
Approx. battery life: 3 years on SR726W X 2

World time
31 time zones (48 cities + coordinated universal time), daylight saving on/off

1/100-second stopwatch
Measuring capacity:
00'00''00~59'59''99 (for the first 60 minutes)
1:00'00~23:59'59 (after 60 minutes)
Measuring unit:
1/100 second (for the first 60 minutes)
1 second (after 60 minutes)
Measuring modes: Elapsed time, split time, 1st-2nd place times

Countdown timer
Measuring unit: 1 second
Countdown range: 24 hours
Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments)

Alarm/hourly time signal
5 daily alarms
Hourly time signal

Double LED light
LED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
LED backlight for the digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)

Light color
LED:White

Calendar
Full auto-calendar (to year 2099)

Mute feature
Button operation tone on/off

Accuracy
Accuracy: ±15 seconds per month

Other features
12/24-hour format
Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.)
Regular timekeeping:
Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (day)
Digital: Hour, minute, second, pm, month, date

For online purchase, you can have bracelet or leather strap adjustments done at any City Chain store. Please bring along your warranty book for the service.

Delivery within Singapore | Order by 11AM
(Checkout options may vary depending on minimum order requirements)

• Free Standard Delivery (3 business days)
• Free Next Day Delivery
• Express Delivery at $30 (order by 2PM)
• Click & Collect (ready in 2–3 business days)

Weekend & Public Holiday Orders
Orders placed during this time will be processed on the next business day.


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