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Casio G-Shock GW-M5610 vs Casio G-Shock GM-2100

The GW-M5610 is the tougher, more self-sufficient watch: solar charging, atomic timekeeping and a slim 52 g resin case that owners treat as a beater for years. The GM-2100 is the dressier pick, with a stainless steel bezel, analog hands and a bigger 49.3 mm case, but it runs on a battery and is less accurate between resets. Buy the 5610 for durability and forget-about-it timekeeping; buy the 2100 if you want an analog G-Shock that looks good with a jacket.

  • Choose the G-Shock GW-M5610 if you want a light, slim, solar-powered watch that sets itself and survives hard daily use.
  • Choose the G-Shock GM-2100 if you prefer analog hands and a steel-bezel look and don't mind a battery swap every few years.

Prices

  • Casio G-Shock GW-M5610: $141.22 at Amazon (last seen Nov 10)
  • Casio G-Shock GM-2100: $179.00 at Jomashop (last seen Nov 10)
  • Difference: the Casio G-Shock GW-M5610 is $37.78 cheaper than the Casio G-Shock GM-2100 at the latest prices (Nov 10)
Casio
G-Shock GW-M5610

Casio G-Shock GW-M5610

G-Shock GW-M5610

4.8(958 ratings)
$141.22at AmazonChecked 5 h ago
See all prices and details
Visit Amazon

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Pros
  • Solar charging means no battery changes
  • Atomic sync keeps it accurate to the second
  • Light at 52 g and slim at 12.7 mm
  • 200 m water resistance and shock resistance
  • Long track record with owners as a durable daily watch
Cons
  • Digital-only display
  • Basic inorganic glass
  • Radio sync depends on signal reception in some regions
  • Small buttons are fiddly to press
Casio
Casio G-Shock GM-2100

Casio G-Shock GM-2100

$179.00at JomashopChecked 5 h ago
See all prices and details
Visit Jomashop

Store links may earn us a commission. Price via Klarna.

Pros
  • Analog hands with a steel bezel look dressier than a resin digital
  • Carbon Core Guard structure and shock resistance
  • Super Illuminator light plus Neobrite lume
  • Slim 11.8 mm profile for its size
  • Full auto-calendar to 2099
Cons
  • Battery replacement every few years
  • No solar or atomic timekeeping
  • Less accurate between resets
  • Bigger case and heavier than the 5610

What separates them

Casio G-Shock GW-M5610Casio G-Shock GM-2100
PowerTough Solar charges from light; no routine battery changesTwo SR726W batteries, about 3 years per set
TimekeepingMulti-band 6 atomic radio sync, auto-corrects dailyQuartz, rated ±15 seconds per month
DisplayDigital onlyAnalog hands plus a small digital subdial
Case and bezelAll resin, octagonal, 46.7 x 43.2 x 12.7 mm, 52 gResin with stainless steel bezel and Carbon Core Guard, 49.3 x 44.4 x 11.8 mm
GlassInorganic glassMineral glass
Night visibilityFull auto EL backlight with afterglowSuper Illuminator LED plus Neobrite lume on hands and markers
Water resistance200 m200 m
Size on wristSlim and light, fits 145-205 mm wristsLarger and heavier, more presence

Price history

$179.00$95.99
Nov 4Nov 11
  • Casio G-Shock GW-M5610: lowest $95.99 on Nov 11 at eBay.
  • Casio G-Shock GM-2100: lowest $179.00 on Nov 11 at Jomashop.

Prices at every store

Casio G-Shock GW-M5610

  • AmazonNew

    Availability unknown

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

    $141.22Free shippingChecked 5 h ago
    Visit Amazon
  • eBayNew

    Availability unknownSold by linknext_japan

    $151.99Checked 5 h ago
    Visit eBay
  • eBayNew

    Availability unknownShips from Japan · duties may apply · made for another marketReturns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $155.99Free shippingChecked Nov 9
    Visit eBay
  • RedDeerWatches.comNew

    Availability unknown

    $179.00Checked Nov 3
    Visit RedDeerWatches.com

Store links may earn us a commission.

All 5 stores and price history →

Casio G-Shock GM-2100

  • JomashopNew

    In stock

    $179.00Free shippingChecked 5 h ago
    Visit Jomashop
  • First Class WatchesNew

    In stock

    $215.00Free shippingChecked 5 h ago
    Visit First Class Watches
  • ZalesNew

    In stock

    $220.00Free shippingChecked 5 h ago
    Visit Zales
  • JaredNew

    In stock

    $220.00Free shippingChecked 5 h ago
    Visit Jared

Store links may earn us a commission. Some prices via Klarna.

All 7 stores and price history →

Specs compared

SpecCasio G-Shock GW-M5610Casio G-Shock GM-2100
Water resistance200M waterproof20 bar water resistant
Glassinorganic glassMineral Glass
ModelCasio G-Shock GW-M5610U-1 Price: ~– ASIN: B007R…—
Case dimensions46.7 x 43.2 x 12.7mm—
Weight52 grams—
Case materialResin—
Strap materialResin Band—
Power sourceTough Solar (solar charging system)—
Strap wearing size145-205mm—
World time48 cities (31 time zones) + UTC—
Timer1 second, maximum setting: 24 hours—
Alarms5 time alarms (only 1 with snooze function), ti…—
Show all 33 specsShow fewer specs
SpecCasio G-Shock GW-M5610Casio G-Shock GM-2100
Color (Strap)Black—
ClosureBuckle—
Watch Strap MaterialResin—
FunctionsTimer, Alarm, Stopwatch, Radio Controlled, Solar—
GenderMale—
SeriesCasio G-Shock—
Case ColorBlack—
Movement TypeQuartz—
Display TypeDigital—
Dial ColorBlack

What reviewers say

Casio G-Shock GW-M5610

  • 4.8 / 5958 ratings

Owners treat the GW-M5610 as the default tough everyday watch: solar, atomic and cheap to keep. Complaints center on display legibility, strap wear and the fiddly setup.

What people mention
  • Solar powerPraisedOwners report the watch keeps charge indefinitely with normal light exposure and never needs a battery.
  • Atomic syncMixedMost owners see nightly sync succeed, but some far from a transmitter rely on manual setting.
  • LegibilityMixedThe digital display is clear in daylight for some, while others find contrast and viewing angles weak.
  • BuildMixedThe watch survives hard use, but the resin bezel and strap show scratches and can crack over time.

Casio G-Shock GM-2100

Owners describe the GM-2100 as a good-looking G-Shock that bridges casual and dressy. Most praise the metal bezel, comfortable fit and tough build; common complaints are the mineral crystal and the size on slim wrists.

What people mention
  • BuildPraisedOwners say the steel bezel and shock-resistant case feel solid and handle daily knocks.
  • LooksPraisedReviewers call it a dressier G-Shock that works with casual and smart outfits.
  • GlassCriticisedSome owners report scratches on the mineral crystal with normal use.
  • SizeMixedThe 49.3 × 44.4 mm case suits many wrists but feels large on smaller ones.

Questions and answers

Which is better for swimming and rough use?
Both are rated 200 m water resistant and shock resistant. The GW-M5610 is lighter and all resin, so it takes knocks with less worry about scratching a steel bezel.
Which keeps better time?
The GW-M5610. It syncs to atomic radio signals up to six times a day. The GM-2100 is a standard quartz rated within ±15 seconds per month.
Do I ever need to change the battery?
On the GW-M5610, normally no, since Tough Solar recharges it from light. The GM-2100 needs a new set of SR726W batteries roughly every three years.
Is the GM-2100 worth stepping up to?
Step up only if you want analog hands and a steel-bezel look. You give up solar power and atomic sync to get them.
Which fits smaller wrists better?
The GW-M5610. Its 46.7 x 43.2 mm case and 52 g weight sit closer to the wrist. The GM-2100 is about 49.3 mm across and noticeably heavier.
Which is easier to read at night?
The GM-2100 has the edge with Super Illuminator LED light plus Neobrite lume on the hands and markers. The GW-M5610 relies on its EL backlight for the digital display.

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  • Casio G-Shock GA-2100 (CasiOak) vs G-Shock GW-M5610
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  • Casio G-Shock GA-2100 (CasiOak) vs Casio G-Shock GM-2100
  • Casio G-Shock DW-5600 vs Casio G-Shock GM-2100

Buying guides that pick them

  • Best men's G-Shock watches
—
Time Format12 Hours, 24 Hours—
Water Protection20 ATM (200m)—
Band material—Tough Silicone Band
Case and bezel material—Resin / Stainless steel
Construction—Shock Resistant, Carbon Core Guard structure
Battery life—Approx. battery life: 3 years on SR726W X 2
Surface treatment—Gold ion plated bezel
Accuracy—Accuracy: ±15 seconds per month
Calendar—Full auto-calendar (to year 2099)
Light—Super Illuminator (high-brightness LED light)
Mute feature—Button operation tone on/off