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Casio G-Shock GA-2100SU-1AER
Casio G-Shock GA-2100SU-1AER.
Casio G-Shock GA-2100SU-1AER.
Casio G-Shock GA-2100SU-1AER.
Casio G-Shock GA-2100SU-1AER.
Casio G-Shock GA-2100SU-1AER.
Casio G-Shock GA-2100SU-1AER.
Casio

Casio G-Shock GA-2100SU-1AER

Price 145.99 USD excluding sales tax
Shipping starting at 12.99 USD Free 100 day returns Free shipping for orders over 200 USD

The GA-2100 is a hugely popular series of analog G-Shocks. It's a fairly recent model and combines the simplicity and spirit of the first analog G-Shock, the AW500, with the octagonal "Casio Square" shape of the first ever G-Shock, the DW5000C. Despite drawing from Casio's own history, the GA-2100 bears a resemblance to another famous watch, which has led people to call this the CasiOak.

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Casio G-Shock GA-2100SU-1AER.
Casio G-Shock GA-2100SU-1AER.
Casio G-Shock GA-2100SU-1AER.
Casio G-Shock GA-2100SU-1AER.
Casio G-Shock GA-2100SU-1AER.
Casio G-Shock GA-2100SU-1AER.

The GA-2100 is a hugely popular series of analog G-Shocks. It's a fairly recent model and combines the simplicity and spirit of the first analog G-Shock, the AW500, with the octagonal "Casio Square" shape of the first ever G-Shock, the DW5000C. Despite drawing from Casio's own history, the GA-2100 bears a resemblance to another famous watch, which has led people to call this the CasiOak.

The GA-2100 series is among the lightest and smallest of G-Shocks available. This has been achieved with Carbon Core Guard, allowing the size of structural components to be reduced while achieving at least the same strength, probably better.

These watches are popular for a reason, and people modify Ga-2100s with custom accessories made by other manufacturers. It's a solid choice if you want an affordable G-Shock with an analog display. The watch – like all Analog / Digital Casios – has a hand shift feature that reveals the display in case it's block o' clock. Just press Mode and Light together.

The suffix SU-1AER means the color code (Special Utility, 1 for Black), A series, and European version. The various regions are most often just packaged a bit differently, and the manual language varies. The 2110 variation has a double molded bezel to enable color variation with a sharp cutoff.

Technical Specs

Casio wristwatches have so much in common that finding the right one for you may be difficult. Here are some simple facts:

  • Width: 45.4 mm
  • Height: 48.5 mm
  • Thickness: 11.8 mm
  • Weight: 51 g
  • Battery / Life: 2x SR726W / 3 years
  • Water Resistance: 20 BAR / 200 m
  • Made in China
  • Module: 5611

Features

These are features that may require clarification and may not be found on all models:

Mineral Glass

Actual glass with heat treatment to prevent scratches. All G-Shocks have at least a mineral glass; the more expensive ones have a sapphire layer on top of it.

World Time

You can choose from 48 cities to set a secondary time, and you can display the time for two locations at the same time. Automatic daylight saving can be toggled. (On a side note, we should all stop that nonsense.)

Countdown Timer

The timer can be set with 1-second increments for up to 24 hours.

Stopwatch

Stopwatch with 1/100th precision to 60 minutes and 1-second precision to 24 hours. Displays elapsed time and can be toggled for split times and 1st and 2nd places.

Alarm Clock / Hourly Signals

You can set five daily alarms and hourly time signals on/off.

Calendar to the year 2099

You don't have to check the date setting of this watch each month: leap years, Februaries, and Biblical events are covered for a very long time – automagically.

Backlight

Dual Super Illuminati backlights. You can make it automatic (usually unnecessary), and the Afterglow can be set to 1.5 or 3 seconds.

Made by Casio

The first invention by Tadao Kashio was the yubiwa pipe: a ring that allows you to smoke a cigarette hands-free and all the way to the end. Tobacco was expensive in war-torn Japan (because WWII), and people had their hands full of work, so this was exactly what the market wanted. With the profits from the pipe, Kashio could fund the development of Casio's first electro-mechanical calculator.

High intelligence and flair for business combined with this sort of diligence could not have led to anything but the success Casio has achieved. The company has been the first mover too many times to mention. Let's skip the list this time.

Being the first mover has not sacrificed quality: many people still use Casio wristwatches they bought 40 years ago, and they have gained the trust of NASA, numerous special (and non-special) forces, law enforcement, paramedics, and so on. Another long list. The TL;DR is that all of these are damn good, pick any one you like!

All products: Casio

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