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Deal.ai › Casio
Casio
Casio GA-2100GB-1AER Mens Watch G-Shock Classic 45mm 20ATM

Casio GA-2100GB-1AER Mens Watch G-Shock Classic 45mm 20ATM

Best price now

$208.17at KlukkanChecked Nov 11

Compared across 2 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Last seen at $208.17 at Klukkan on Nov 11.
  • Checked at 2 stores.

Our take on the Casio GA-2100GB-1AER Mens Watch G-Shock Classic 45mm 20ATM

The Casio G-Shock GA-2100GB-1AER is the all-black 'CasiOak' — a slim analog-digital G-Shock with an octagonal bezel and a carbon core guard case. It is 45mm across but only about 11.8mm thick, so it wears smaller than most G-Shocks and slips under a cuff. It offers 20 ATM water resistance, shock resistance, world time, a stopwatch, countdown timer, five daily alarms and Super Illuminator LED light, with hands and markers that glow in the dark. It suits people who want a tough everyday watch with a clean, understated look rather than a bulky tactical one.

Best forEveryday wear with casual or street clothingBuyers who want a slim, understated G-ShockSwimming, surfing and outdoor workFirst analog-digital watch or a gift
Pros
  • Slim 11.8mm case wears well under a sleeve
  • Carbon core guard case and 20 ATM water resistance
  • Octagonal bezel gives it a cleaner look than most G-Shocks
  • Analog hands plus digital display covers time, date and timers
  • Super Illuminator LED and luminous hands for low light
  • Mineral glass and resin strap keep it light on the wrist
Cons
  • Negative LCD display is hard to read in dim light
  • Hands can obscure the small digital subdial
  • Resin strap and bezel show scuffs over time
  • No solar charging or Bluetooth like some pricier G-Shocks
  • Small digital digits take getting used to

Casio GA-2100GB-1AER Mens Watch G-Shock Classic 45mm 20ATM prices at every store

  • KlukkanNew

    In stockShips from Iceland · priced in ISK (ISK 25,592) · duties may applyReturn policy

    $208.17Checked Nov 11
    Visit Klukkan
  • The Time TreasuresNew

    In stockShips from Australia · duties may applyReturn policy

    $225.00Checked Nov 10
    Visit The Time Treasures

What reviewers say

Owners rate the GA-2100 line highly for its slim case and tough build, and the all-black version is popular for its subtle look. The most common complaints are the hard-to-read negative display and the small digital window.

What people mention
  • Display legibilityCriticisedOwners say the negative LCD is hard to read in low light and the digital digits are small.
  • Size and fitPraisedReviewers like how slim the case is for a G-Shock and how well it fits under a sleeve.
  • BuildPraisedThe carbon core guard case and shock resistance are seen as solid and durable.
  • DesignPraisedThe octagonal bezel and all-black finish get frequent praise for looking understated.
  • Strap wearMixedSome owners report the resin strap and bezel scuff and fade with daily use.

About the Casio GA-2100GB-1AER Mens Watch G-Shock Classic 45mm 20ATM

The Casio G-Shock GA-2100GB-1AER is a men's watch from the G-Shock Classic series. It has a square carbon case with a fixed bezel, a black plastic strap and a buckle clasp. The dial is golden, and the case has both matted and polished surfaces.

It combines analog and digital displays and runs on a quartz battery movement. Functions include 12/24-hour format, alarm, stopwatch and an automatic calendar. Lighting comes from an LED light, with illuminated indexes and hands. The case is water resistant to 20 ATM.

Brand
Casio
Model number
GA-2100GB-1AER
Series
G-Shock Classic 45mm 20ATM
Gender
Men's
Style
Classic, retro, vintage
Display
Analog and digital
Movement
Battery (quartz)
Functions
12/24-hour format, alarm, automatic calendar, date, day, month, year, hour, minute, second, stopwatch
Lighting
LED light, illuminated indexes, illuminated hands
Case material
Carbon
Case width
45 mm
Case thickness
12 mm
Case shape
Square
Case color
Black
Case finish

Questions and answers

Is the GA-2100GB-1AER good for swimming?
Yes. It is rated 20 ATM, which covers swimming and snorkeling. It is not a dive computer and the buttons should not be pressed underwater.
How does it compare with the standard GA-2100?
It is the same case and module; this version is the all-black colorway with a negative LCD. The standard model comes in other colors and some with a positive display that is easier to read.
Does it have solar charging or Bluetooth?
No. It runs on a standard battery and has no Bluetooth or solar charging. Those features appear on higher G-Shock lines.
How big does it wear?
The case is 45mm wide but only about 11.8mm thick, so it sits flatter than most G-Shocks. It suits medium to large wrists.
What is in the box?
The watch, a Casio manual and the usual warranty paperwork. No extra strap or tool is included.
Is the display easy to read at night?
The Super Illuminator LED lights the dial, and the hands and markers glow. The negative LCD stays low-contrast even when lit.
Where is the Casio GA-2100GB-1AER Mens Watch G-Shock Classic 45mm 20ATM cheapest?
At Klukkan, for $208.17, as of our latest check.
Where can I buy the Casio GA-2100GB-1AER Mens Watch G-Shock Classic 45mm 20ATM?
2 stores we checked sell it, including Klukkan, The Time Treasures.

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Water resistance
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