Product Details

• Amazon Sales Rank: #1124 in Watches
• Brand: Casio
• Model: EF305-1AV
• Dimensions: 1.00 pounds
• Band material: Resin
• Bezel material: stainless-steel
• Case material: stainless-steel
• Clasp type: Buckle
• Dial color: black
• Dial window material: Mineral
• Movement type: Quartz
• Water-resistant to 330 feet

Features

• Quartz movement
• Protective Mineral crystal protects watch from scratches
• Case diameter: 10 mm
• Stainless-steel case; Black dial; Day-and-date functions
• Water-resistant to 330 feet (100 M)

Amazon.com Product Description
The Casio Men's Multifunction Analog Watch #EF305-1AV features a dramatic black dial face that is protected by a durable mineral dial window. Contrasting indexes and Arabic numerals offer at-a-glance clarity, and three handy sub dials track the day, date, and 24-hour clock. A black resin band is accompanied by a sturdy buckle clasp. Other details include a 10-millimeter stainless steel case and silver-tone stationary stainless steel bezel. Highly affordable, this sophisticated timepiece sets off your look with a fresh finish. It is powered by quartz movement and is water resistant to 330 feet.

Development of the Timepiece Business
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.

Customer Reviews

Excellent Work/Casual watch
This watch is an excellent every day watch for someone who wants an affordable watch that they can wear to work or to the park. With its chronograph styling, dark resin band, and classic sizing (I think it's ~38mm diameter and not too thick, though as I recently lost mine I can't be sure), it definitely will give the impression that you are wearing a much more expensive watch. When I used to wear it, I got compliments on it all the time and cost estimates in the hundreds =D.

However, don't be fooled by the "multifunction watch" title. The sub-dials show day/date/24-hour time, and that's it--no dual time, no stopwatch, it's not a digital watch replacement. The second markings aren't clear or accurate enough for you to really time anything. This was mostly fine for me but I found myself occasionally missing those functions. What I personally found most annoying, however, was the choice of mineral crystal as the watch window material, a poor compromise between acrylic and sapphire glass. Harder than acrylic, but way softer than sapphire, it still scratches fairly easily for a "beater" watch but you don't have the option of easily buffing it out.

Good price, nice watch
I've had this watch for about a month and wear it daily to work. For the price point I feel it's well made. All hands function as they should. Time and day of the week are easy to read, but the smaller date hand can be hard to read at a glance. The band is comfortable to wear during long hours at work and it does not retain water as many link bands tend to do if you have to wash your hands frequently. The stainless steel case is attractive; a nice size for a man's watch--too soon to comment on durability but for around $30 you can't go wrong.

GREAT WATCH AND QUALITY
Great looking watch at a very low price. The watch looks expensive when its not. Great quality as well very long lasting. HIGHLY RECOMMENDED.