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Casio Men's GS1100-1A G-Shock GIEZ Series Multi-Band Solar Atomic Watch


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  • Quartz movement
  • Tough solar power; shock resistant; auto EL backlight with afterglow
  • World Time - 29 times zones (30 cities), city code display, daylight saving on/off
  • Water resistant up to 660 feet (200 M)
  • Water-resistant to 660 feet (200 M)

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Product Specifications

Watch Information
Brand, Seller, or Collection Name Casio
Model number GS1100-1A
Part Number GS1100-1A
Item Shape Round
Dial window material type Mineral
Clasp Buckle
Case material Stainless steel
Case diameter 47 millimeters
Case Thickness 15 millimeters
Band Material Resin
Band length mens
Band width 25 millimeters
Band Color Black
Dial color Black
Bezel material Stainless steel
Bezel function Stationary
Calendar Day
Special features World time
Movement Quartz
Water resistant depth 660 Feet
Warranty type Contact seller of record

Product Description

With the launch of its first watch in November 1974, Casio entered the wristwatch market at a time when the watch industry had just discovered digital technology. As a company with cutting-edge electronic technology developed for pocket calculators, Casio entered this field confident that it could develop timepieces that would lead the market.

In developing its own wristwatches Casio began with the basic question, ""What is a wristwatch?"" Rather than simply making a digital version of the conventional mechanical watch, we thought that the ideal wristwatch should be something that shows all facets of time in a consistent way. Based on this, Casio was able to create a watch that displayed the precise time including the second, minute, hour, day, and month — not to mention a.m. or p.m., and the day of the week. It was the first watch in the world with a digital automatic calendar function that eliminated the need to reset the calendar due the variation in month length. Rather than using a conventional watch face and hands, a digital liquid crystal display was adopted to better show all the information. This culminated in the 1974 launch of the CASIOTRON, the world’s first digital watch with automatic calendar. The CASIOTRON won acclaim as a groundbreaking product that represented a complete departure from the conventional wristwatch.

Casio transformed the concept of the watch — from a mere timepiece to an information device for the wrist — and undertook product planning based on this innovative idea. We developed not only time functions such as global time zone watches, but also other radical new functions using Casio’s own digital technology, including calculator and dictionary functions, as well as a phonebook feature based on memory technology, and even a thermometer function using a built-in sensor. The memory-function watches became our DATA BANK product series, while the sensor watches developed into two unique Casio product lines of today: the Pathfinder series displaying altitude, atmospheric pressure, and compass readings.

In 1983, Casio launched the shock-resistant G-SHOCK watch. This product shattered the notion that a watch is a fragile piece of jewelry that needs to be handled with care, and was the result of Casio engineers taking on the challenge of creating the world’s toughest watch. Using a triple-protection design for the parts, module, and case, the G-SHOCK offered a radical new type of watch that was unaffected by strong impacts or shaking. Its practicality was immediately recognized, and its unique look, which embodied its functionality, became wildly popular, resulting in explosive sales in the early 1990s. The G-SHOCK soon adopted various new sensors, solar-powered radio-controlled technology (described below), and new materials for even better durability. By always employing the latest technology, and continuing to transcend conventional thinking about the watch, the G-SHOCK brand has become Casio’s flagship timepiece product.

Today, Casio is focusing its efforts on solar-powered radio-controlled watches: the built-in solar battery eliminates the nuisance of replacing batteries, and the radio-controlled function means users never have to reset the time. In particular, the radio-controlled function represents a revolution in time-keeping technology similar to the impact created when mechanical watches gave way to quartz technology. Through the further development of high radio-wave sensitivity, miniaturization, and improved energy efficiency, Casio continues to produce a whole range of radio-controlled models.

  • ASIN: B000UV0MHK
  • Product Dimensions: 5 x 3.2 x 2.8 inches; 7.2 ounces
  • Shipping Weight: 7.2 ounces
  • Item model number: GS1100-1A
  • Amazon Best Sellers Rank: #29,477 in Watches (See Top 100 in Watches)
    • Average Customer Review:

    Customer Reviews

    I have had this watch for over a year now.
    stephenwhite78
    And the real problem: East Coast Daylight Savings time throws the watch off until you get a sync.
    Aristotle
    I read manual again and again and tried to set function many time, but I still don't know.
    Justin

    Most Helpful Customer Reviews

    51 of 56 people found the following review helpful By Cameron R. Settle on June 14, 2009
    --- Warning: Long, opinionated review ahead ---

    I could go on and on about how many watches I own (40+), I could list off the caliber of watches I have (Jaeger-LeCoultre, two Rolexes, Zeneth, Franck Muller)... but what I do want to go on about is my love of this Giez watch.

    I have many watches (see above) and many of them are the various models of Casios which have been released over the years; from the first pathfinder watch to the current Riseman. The Giez GS1100 is by far one of my favorites. Reason - Form, Function and a wondrous movement.

    Form - Simple and clean at first glance, then as you look closer the detail comes to light.

    Function - it does what it should do. It is one of the most accurate timepieces on the planet. On the most basic of levels, it tells time, has a stop watch, one daily alarm, day and date. For those who need it; it has world time mode and it (the watch) supports the National Institute of Standards and Technology reception standards for the US as well as those for Japan, The UK and Europe.

    Here is a little, how shall we say... commentary:

    The watch is fluid, it has a gear driven movement (the same as the $900 Oceanus line by Casio). It should be looked upon not as a digital watch but as a precision time keeping instrument. The few reviewers whom complained about the movment taking forever; stop playing with your watch, it's not a toy. Set it and know that it works. As an aside, if you are a global jet setter and you need to change the world time city, press the mode button and then immediatly hit the reset/advance button; it will advance the second hand/city indicator with out having to wait for the current setting to queue up.
    Read more ›
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    10 of 11 people found the following review helpful By D. Adkins on April 7, 2008
    Top quality watch! Full feature set with the added bonus of Solar and Atomic clock sync'ing. The build is very good and I really like the well thought out style of the watch. It does so much so well it moved me to write a review - which I very rarely do. It seems to be the perfect Expedition watch - a rugged and accurate instrument.
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    5 of 5 people found the following review helpful By C. Michael Watkins on October 22, 2009
    Verified Purchase
    Great looking watch, feels and looks solidly made - very "macho" while maintaining a degree of quality and class that is missing in many other very expensive brands.
    With an attractive design, lots of function and clear function layout, it is, for the (Amazon) price, excellent value.
    On the downside, rather too chunky - sits high on the wrist which makes it prone to snagging - and the resin band gets "itchy" if worn tightly enough to eliminate too much slack.
    I find the day function symbols a little too small for my ageing eyes
    The operations guide is confusing at first and procedures for taking advantage of all the functions appear a little complex - it took some time before I could understand the different modes and get comfortable enough to use most of the functions. After 6 weeks I still could not use them all without going back to the manual. The stop-watch function is certainly intuitive, however.
    Synching with the Atomic time server is rather hit or miss - especially, for US buyers, if outside the 600 mile signal radius from Fort Collins, CO - but the accuracy and reliability of the watch appears to make any gap between synchs moot.
    Alarm beep is almost inaudible with no apparent volume control and doesn't work at all when following some function procedures (on my watch) - like setting "Home City" which requires you to "hold down A for about 5 seconds until alarm beeps twice"
    Despite the above, I am becoming much more comfortable with the functions as time goes on and am increasingly pleased with my purchase of this watch.
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    5 of 5 people found the following review helpful By G. Waters on January 22, 2008
    It works great. The second hand lags if not left face up due to power saving mode, but you get use to it. I have been wearning it for work and play and it looks like it is worth more than paid for.
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    10 of 12 people found the following review helpful By S. J. Schoenewald on December 2, 2008
    Verified Purchase
    Way to go Casio! This is the watch I have been wanting for a long time. Should have bought one sooner. It was easy to set up and now I don't have to worry about batteries and not having the right time and date. Since receiving this watch, I checked the time several times a day against another verified source, to see if the watch was keeping the right time. I now trust the time indicated as true. Was worth every dollar I paid. I highly recommend this watch to anyone needing a "set and forget it" new watch or replacement.
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    4 of 4 people found the following review helpful By Sudhakar Mishra on October 16, 2009
    Verified Purchase
    This is a really nice watch for people who travel frequently.

    Pros:
    1) Looks & Finish
    2) Functionality
    3) Ruggedness (Its G-Shock!)

    Cons:
    1) Difficult to operate.

    Its difficult to operate & takes a lot of time in setting up (that's the reason I gave it 4 stars), but you'll get used to it.

    Well, in a crux, its a value for money watch with loads of fuction & style. Go for it....!
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    4 of 4 people found the following review helpful By circawdm on May 21, 2009
    I have about 50 watches - from expensive mechanicals to fairly complicated multi-function chronos. This is my 6th Casio, and I have 3 other solar-atomics from them which take abit of reading to learn how each works naturally. But it's NOT "rocket science." Each watch is abit different. My experience is that this watch works fine in all respects, has a nice look, nice functions, "set it and forget it." Easy.

    Possibly a metal and resin band might "jazz it up" abit. But for the price and features, it's not a big deal. Casio really has it over Citizen and Seiko on great looking watches with atomic/solar features, plus all the other usual chronograph and multi-dial features. And all at very reasonable prices. Five stars from me, and I am a tough grader when it comes to watches.
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