G-SHOCK

GA2100RB-3A

Archive model

This product is no longer available for purchase.

G-SHOCK, a brand known for it’s unrivalled toughness has continued to evolve in durability and functionality since its launch in 1983, a true cultural icon since inception.

With such a legacy, G-SHOCK connected with Rich Brian, an esteemed label mate at 88rising, to reinterpret a timepiece of his choice. The watch Brian gravitated towards is the rugged GA-2100.

It pulls design and aesthetic queues from other watches within the G-SHOCK lineage and is known for its octagonal bezel and minimalistic design.

Brian’s reinterpretation is inspired by a guitar he fell in love with as a young boy in Indonesia. The bold seafoam green base colour is paired with the salmon pink accents, reminiscent of the guitar Brian spent his childhood obsessing over.

To complete the design, Brian’s signature adorns the case back, almost as a dedication to his younger-self. In a way, his reinterpretation serves as a reminder of his origins and unrelenting pursuit of artisanship.

    Basic Information
    • Band
      Resin Band
    • Case and bezel material
      Carbon / Resin
    • Case size (L × W × H)
      48.5 × 45.4 × 11.8 mm
    • Construction
      Shock Resistant, Carbon Core Guard structure
    • Power supply and battery life
      Approx. battery life: 3 years on SR726W X 2, Approx. battery life: 3 years on CR1025
    • Water resistance
      200-metre water resistance
    • Weight
      51 g

    Exterior
    • Compatible band size
      145 to 215 mm
    • Glass
      Mineral Glass
    • Other
      Neobrite

    Features
    • Accuracy
      Accuracy: ±15 seconds per month
    • Alarm / hourly time signal
      5 daily alarms
      Hourly time signal
    • Calendar
      Full auto-calendar (to year 2099)
    • Light
      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)
    • Mute feature
      Button operation tone on/off
    • 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
      Analog: 2 hands (hour, minute (hand moves every 20 seconds))
      Digital: Hour, minute, second, pm, month, date, day
    • Stopwatch
      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
      Measuring capacity: 00'00''00~59'59''99 (for the first 60 minutes)
      Measuring unit: 1/100 second (for the first 60 minutes)
    • Timer
      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)
    • World time
      World time
      31 time zones (48 cities + coordinated universal time), daylight saving on/off
    User Manual – Module 5611

    Rich Brian Collaboration model

    The watch Brian gravitated towards is the rugged GA-2100.

    The design was inspired by a guitar he fell in love with as a young boy in Indonesia.

    Rich Brian

    Brian’s reinterpretation is inspired by a guitar he fell in love with as a young boy in Indonesia. The bold seafoam green base colour is paired with the salmon pink accents, reminiscent of the guitar Brian spent his childhood obsessing over.

    Unified image with seafoam green

    Brian’s signature adorns the case back

    Salmon pink colour loop as an accent

    With a special package

    Feature List

    • Minimalist black outline icon of two hands shaking, symbolizing partnership and professional collaboration.

      Collaboration model

    • Black icon of a watch hitting a flat surface with motion lines indicating a shock or impact.

      Shock resistant

    • Black icon of a person snorkeling with the number 20, representing a 20-bar pressure rating for water resistance.

      20 bar water resistant

    • Minimalist black and white icon of a person checking a glowing watch under a crescent moon at night.

      Easy to see in darkness

    Shop G-SHOCK Rich Brian Collaboration GA-2100RB

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    Compare key specifications across models in this collection.

    G-SHOCK-GA2100RB-3A-CASIO Australia
    GA2100RB-3A
    View details
    Price
    Price
    $299.00
    Case size (L × W × H)
    Case size (L × W × H)
    48.5 × 45.4 × 11.8 mm
    Weight
    Weight
    51 g
    Water resistance
    Water resistance
    200-metre water resistance
    Band
    Band
    Resin Band
    Glass
    Glass
    Mineral Glass
    Power supply and battery life
    Power supply and battery life
    Approx. battery life: 3 years on SR726W X 2, Approx. battery life: 3 years on CR1025
    Accuracy
    Accuracy
    Accuracy: ±15 seconds per month
    World time
    World time
    World time
    31 time zones (48 cities + coordinated universal time), daylight saving on/off
    Stopwatch
    Stopwatch
    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
    Measuring capacity: 00'00''00~59'59''99 (for the first 60 minutes)
    Measuring unit: 1/100 second (for the first 60 minutes)
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