Product Details

• Amazon Sales Rank: #161 in Watches
• Brand: Casio
• Model: G9100-2
• Dimensions: 2.80" h x 3.10" w x 4.90" l, .30 pounds
• Band material: Resin
• Bezel material: Resin
• Case material: stainless-steel
• Clasp type: Buckle
• Dial color: digital
• Dial window material: Mineral
• Movement type: Quartz
• Water-resistant to 660 feet

Features

• Quartz movement
• Protective Mineral crystal protects watch from scratches
• Case diameter: 45 mm
• Stainless-steel case; Digital dial; Day-date-and-month functions
• Water-resistant to 660 feet (200 M)

Amazon.com Product Description
This Casio men's G-Shock watch is perfect for seafarers; it provides moon data and a tide graph so you'll always know what the tide is. In addition, the digital watch also shows the time in 29 time zones, has three multi-function alarms, a countdown timer, a stopwatch, and auto electroluminescent backlight with Afterglow. The stainless steel case has a dark blue resin bezel that provides shock resistance. A matching blue resin band provides a secure fit and the watch is water resistant to 660 feet (200 meters). It is covered by the manufacturer's 1-year warranty.

The G-Shock Story

G-Shock - Absolute Toughness

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

Casio’s G-Shock line was created on just such a directive: to build a watch that never breaks. And in 1983, this product was developed to shatter the notion that a watch is simply a fragile piece of jewelry that needs to be handled with care.

G-Shock is renowned as the world’s toughest watch and is in the midst of a huge renaissance since its 25th anniversary celebration last year. It is the best trending watch brand in the industry right now and thanks to its toughness and durability as well as it’s cutting-edge technology, it is among the best values in not only timekeeping but all personal accessories.

In addition to toughness, 200 meter resistance and fantastic cutting edge and hip styling some G-shocks also have such technology as Tough Solar Power for battery life of 20-30 years (great for our planet), Atomic timekeeping for the more precise time available on earth as well as unique features like moon phase and tide graphs.

G-Shocks come in a variety of styles including Rubber/Resin bands, Solid Stainless Steel and even Titanium.

Since it’s launch, Casio’s G-Shock continues to evolve and push the envelope. The non-stop, self-adjusting (solar-powered atomic-timekeeping) G-Shocks featured in the Amazon.com assortment are the latest, greatest example of this evolution!

The Casio Story

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.

Customer Reviews

Nice Watch
Solid watch for those who like a watch on steroids. Functions work well with no issues. Lights up nicely at night. The blue color is unique and breaks the monotony of the normal black style for this watch without being "loud" in color.

Tide function of the Casio watches is the only one I've found you can custom set up by the lunitidal interval for any given area. Granted, it's tricky and requires you to look up the info yourself and put that interval in but the manual does come with a sizeable list intervals of beaches all over the world. If you care to you can program it to your beach based on your local info. A quick search on the web will yield instructions on how to do this.

Not a Bad Find
The Gulfman has its ups and downs. Firstly, its features (i.e. time, day, date, stopwatch, timer, world time, alarm, moon phase, and tide graph) come in handy. I am 21 years old and have been a licensed and avid scuba diver since I was 11; I needed a new dive watch after mine finally gave out and flooded, and I didn't feel it was necessary to drop half a grand on the G-Shock Frogman, although it was very tempting. I needed a watch that was capable of withstanding at least 180 feet of underwater submersion and possessed timer/stopwatch capabilities. The moon and tide graphs are an extra bonus, especially considering that the tide graph mode will depict the approximate tide for any specific time of day. The backlight is also nice to have in an underwater scenario (i.e. cave, wreck, and night diving) and is clearly visible. The watch fits snuggly to the wrist without any sliding around.

The watch itself is, however, a little bulky, although fairly light, especially when compared to other dive watches. The circular seconds graph is, in my opinion, a waste of space, as you can clearly see the seconds counting in the main time window, it just seems redundant. Programming the watch can be intimidatingly complicated at times. To program your "Home Site Data," you are required to know your longitudinal value and your lunitidal intervals in hours and minutes (the data is set to Japanese values by default). This was somewhat daunting and after a few hours researching on the internet I finally got the correct data inputted, I hope.

My greatest concern is that the tide/moon graphs rely on the Home Site Data, because I do not use the tide/moon graphs at home, I use them in whatever country I'm diving in. So, when I use the tide/moon graphs, I have to reprogram the watch and change the Home Site Data to wherever my dive sites are, and vice versa when I return home. Extremely annoying. If it possessed atomic time capabilities, which it doesn't, things might be different and the Home Site Data might be automatically altered wherever I went.

All in all, however, I consider the Gulfman to be well worth the Amazon price, and a cheap, effective alternative to the Frogman.


Pros: Light, snug fit, visible display and backlight, handy features, rust resistant, water resistant to 20 bar, well-priced.

Cons: Bulky, wasteful seconds graph, Home Site Data programming, tide/moon graphs work only at home site, not atomic, not solar, NOT INTENDED FOR SCUBA DIVING.

Great watch
Pro's- You are not going to get a more durable, accurate and tough watch for the money. This watch gets torture tested everyday, without a glitch. The illumination is great at night, and the display is easy to read. It feels very lightweight, but is very durable. If you want a good, solid, accurate watch which will last forever and are not looking to make a fashion statement, this is the watch for you.
Con's- It isnt the coolest looking watch in the world, but if you wanted a stylish watch to match your dress, G-shock isnt exactly for you anyway, right.