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Casio G-Shock Men's Watch GA-2100-1A Analog-Digital

Casio G-Shock Men's Watch GA-2100-1A Analog-Digital

5(1 rating)

Best price now

$78.52at WalmartChecked 59 min ago

29% under what the other stores charge

Compared across 10 stores. Prices are checked against each store and labelled with when.

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Price facts

  • Lowest price today: $78.52 at Walmart (checked Nov 11, 2026).
  • Checked at 10 stores.

Our take on the Casio G-Shock Men's Watch GA-2100-1A Analog-Digital

The GA-2100-1A is the all-black version of Casio's octagon-shaped G-Shock, nicknamed the CasiOak for its resemblance to a far more expensive steel sports watch. Its Carbon Core Guard case is just 11.8 mm thick, the slimmest among G-Shock analog-digital models, so it slips under a sleeve where most G-Shocks won't. It pairs analog hands with a small digital display, adds 200 m water resistance, shock resistance, a double LED light and Neobrite hands. It suits people who want G-Shock toughness in a lighter, dressier package; rivals like the GA-110 or DW-5600 are chunkier or plainer, and the GA-2100 trades their extra sensors for a cleaner look.

Best forEveryday wear with casual or smart-casual clothesBuyers who find standard G-Shocks too bulkyWater sports and outdoor use up to 200 mFirst G-Shock or a gift for a teenager or adult
Pros
  • Slim 11.8 mm carbon-reinforced case wears lighter than most G-Shocks
  • Octagon bezel gives a cleaner, less toy-like look
  • 200 m water resistance and shock resistance
  • Analog hands plus digital window cover time, date and stopwatch
  • Neobrite lume and double LED light for dark reading
  • Mineral glass and resin band keep it low-maintenance
Cons
  • All-black dial and hands are hard to read in low light until the LED is on
  • No solar charging or Bluetooth, unlike pricier G-Shock models
  • Resin band and bezel show scuffs and fingerprints
  • Digital window is small and fiddly to set without the manual
  • No compass, altimeter or barometer that some G-Shock lines offer

Casio G-Shock Men's Watch GA-2100-1A Analog-Digital prices at every store

  • Montres Big Time WatchesNew

    In stockPriced in CAD (CA$129.00)Return policy

    $90.62Checked 59 min ago
    Visit Montres Big Time Watches
  • CreationWatches.comNew

    In stockShips from abroad · duties may apply

    $105.00Free shippingChecked 59 min ago
    Visit CreationWatches.com
  • Watches & PensNew

    In stock

    $156.05Checked 59 min ago
    Visit Watches & Pens
  • Chrono24.comNew

    In stock

    $104.00+ $250.00 shippingChecked 59 min ago
    Visit Chrono24.com
  • WalmartNew

    Availability unknownSold by My Gift Stop

    $78.52Checked 59 min ago
    Visit Walmart
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $110.00Free shippingChecked 59 min ago
    Visit Amazon
  • Helzberg DiamondsNew

    Availability unknown

    $110.00Checked 59 min ago
    Visit Helzberg Diamonds
  • Bloomingdale'sNew

    Availability unknown

    $110.00Checked 59 min ago
    Visit Bloomingdale's
  • eBayNew

    Availability unknownSold by watchgalactic

    $119.50Checked 59 min ago
    Visit eBay
  • First Class WatchesNew

    Availability unknownShips from abroad · duties may apply

    $130.00Checked 59 min ago
    Visit First Class Watches

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Casio G-Shock Men's Watch GA-2100-1A Analog-Digital price history

Lowest price we've seen: $78.52 on Nov 11 at Walmart. Tracked across 9 stores since Nov 11.

What reviewers say

Owners treat the GA-2100-1A as the G-Shock for people who don't like G-Shocks: slim, understated and tough. Reviewers consistently praise the size and the octagon look, and most complaints center on legibility of the blacked-out dial and the plastic feel of the band.

What people mention
  • Size and weightPraisedOwners say the slim case sits flat on the wrist and disappears under a cuff, unlike bulkier G-Shocks.
  • LegibilityCriticisedThe all-black dial and hands are hard to read in low light, so many rely on the LED or Neobrite lume.
  • BuildPraisedReviewers report the carbon case and mineral glass shrug off knocks, scratches and water.
  • BandMixedThe resin strap is durable but some find it stiff when new and a magnet for dust and scuffs.
  • SetupMixedSetting time, date and stopwatch through the small digital window takes practice and the manual.
  • ValuePraisedBuyers see it as a lot of toughness and style for the money compared with other G-Shock lines.

About the Casio G-Shock Men's Watch GA-2100-1A Analog-Digital

The Casio G-Shock GA-2100-1A is an analog-digital watch with an octagonal case, a form carried over from the original DW-5000C of 1983. The case is 11.8 mm thin, the thinnest among G-Shock combination models. It is shock resistant and water resistant to 200 meters.

The case is made of resin reinforced with carbon fibers. A carbon core guard structure encloses the module in a carbon case to protect it, giving the case strength and crack resistance. The watch has a resin band and a mineral glass cover. The GA-2100-1A has Neobrite.

Two LED lights illuminate the face and the digital display. Both have a super illuminator and afterglow, and the illumination duration can be set to 1.5 or 3 seconds. The watch also has world time and a 1/100-second stopwatch.

Display
Analog-digital
Case material
Carbon / resin
Band
Resin
Glass
Mineral glass
Case thickness
11.8 mm
Water resistance
200 meters
Lighting
Double LED light with super illuminator and afterglow; 1.5 or 3 seconds
World time
31 time zones (48 cities plus UTC), daylight saving on/off, home city and world time city swapping
Stopwatch
1/100-second; 00'00''00 to 59'59''99 for the first 60 minutes, then 1:00'00'' to 23:59'59''
Durability
Shock resistant

Questions and answers

Is the GA-2100-1A hard to read?
In daylight the analog hands are fine, but the black-on-black dial is dim in low light. The Neobrite hands and double LED light help at night.
How does it compare with the GA-110 or DW-5600?
It is noticeably slimmer and lighter than the GA-110 and has analog hands the DW-5600 lacks. Both rivals are tougher-looking but bulkier on the wrist.
Does it have solar charging or Bluetooth?
No. The GA-2100-1A runs on a standard battery and has no Bluetooth or app connection. Solar and Bluetooth start higher in the G-Shock range.
Is it good for swimming?
Yes. It is rated to 200 m water resistance, so swimming and snorkeling are fine. Avoid pressing buttons underwater.
What is in the box?
The watch, a resin band already fitted, and the manual. No charging cable or extra strap is included.
Is the band replaceable?
Yes. The resin band uses standard G-Shock spring bars, and third-party or Casio replacement bands are widely available.
Where is the Casio G-Shock Men's Watch GA-2100-1A Analog-Digital cheapest?
At Walmart, for $78.52, 29% under what the other stores charge, as of our latest check.
What do buyers say about the Casio G-Shock Men's Watch GA-2100-1A Analog-Digital?
Rated 5 out of 5 from 1 ratings.
Where can I buy the Casio G-Shock Men's Watch GA-2100-1A Analog-Digital?
10 stores we checked sell it, including Montres Big Time Watches, Amazon, Walmart, Chrono24.com, CreationWatches.com.

Stores we've priced the Casio G-Shock Men's Watch GA-2100-1A Analog-Digital at

  • Bloomingdale's deals and prices
  • Chrono24.com deals and prices
  • CreationWatches.com deals and prices
  • Helzberg Diamonds deals and prices
  • Walmart deals and prices

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