Casio Men's Analogue-Digital Quartz Watch with Plastic Strap GM-2100-1AER

Product Information

Of the DW-5000C-derived Casio designs, this is one of the best, and while I’d like to see a little more contrast on the dial of the Full Metal GMB2100 or an option for a strap, both the Metal-Covered GM2100 and the Full Metal GMB2100, represent great looking watches, with good Japanese quartz precision, and incredible durability. One simple yet useful upgrade Casio made to the GMB2100, is the addition of lume for the hour markers, not just luminous hour and minute hands, as was the case with the GM2100. Both have on-demand dual LEDs for visibility in total darkness, still, the fully-lumed dial is a nice touch. The metal bracelet of the GMB2100 is nicely tapered and feels good on the wrist. Yet what’s practically unavoidable for any watch with an integrated metal bracelet, is the added heft. The bracelet, and to a lesser extent, the heavier module and full-metal case construction, make for a watch that weighs 168.9 grams versus just 71.5 grams for the GM2100 with a resin strap. Titanium, forged, and ceramic are three options to reduce weight from bracelets, however, those also add cost. A fourth option, and one that’s been used by Casio in the past, is to essentially hollow out a steel bracelet and fill it with resin, which significantly reduces weight while not exceedingly raising the cost. Two examples of that within that MT-G collection can be seen here and here. Despite weight savings, some consumers will never want a strap over a metal bracelet, especially for a sports watch. Maybe because of the looks, or perhaps they prefer the heavier feel or both. Nevertheless, Casio offers both, although, for the time being, there’s no way to add a factory metal bracelet to the GM2100 or a factory strap to the GMB2100. Elapsed time, split time and final time are measured with 1/100-sec accuracy. The watch can measure times of up to 24 hours. A luminous coating provides long-term illumination in the dark after only a short exposure to light.

There are 5 daily alarms available to set and an on/off hourly time signal, as well as a battery level indicator so you can ensure that the battery has received enough sunlight/artificial light. To conserve energy, the Power Saving features blanks out the display automatically when not in use (left in the dark). With the Casio Watches App, you can set the world time with 38 time zones (38 cities + coordinated universal time), city name display, daylight saving on/off, auto summer time (DST) switching, and Home city/World time city swapping (approximately 300 cities in total).

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Pressing a button on the watch records the date, time, and position on a map, which is then viewable within the Casio Watches App. The watch can remind you of up to five upcoming events, which you set within the app. There’s a phone finder function activated from the watch. Measuring Capacity: 24 hours, Measuring Modes: Elapsed time, split time, Measuring Unit: 1/100 second (for the first 60 minutes) 1 second (after 60 minutes)

On the wrist, I expected the 44 mm diameter to be cumbersome and a bit too large for my wrist and personal taste, but in reality, the case feels more like a 40 or 42 mm, primarily because the hinges on the left and right sides of the case add to the diameter but don’t make the watch wear as large as the dimensions suggest. I’ve yet to try on the smaller GMS2100 Series, which measures 40 mm in diameter, but I imagine it will have similar real-life wearability, which is to say it will likely wear small and comfortably as well — which is a good thing. At 11.8 mm, the case is incredibly thin and greatly enhances the incredible ergonomics. The lug-to-lug at 48.5 mm is also a key factor in why this watch wears so well (Casio’s official specifications state that it’s 49.3 lug-to-lug). A full auto-calender displays the day (days of the week can be selected in six languages), date, month, and year (accurate to 2099). You can run the digital display in a 12/24 hour format. The push buttons can be set to have a tone when operated or not. In my experience, the brushed surface of the bezel holds up well, even with significant impacts. However, I’m not sure how durable the polished portion of the case will be, although on the sample units the only noticeable scratches were actually on the bezel, which you may notice in some of the photos in this review. The hour and minute hands move like normal quartz-powered analog hands, with the exception that the minute hands move every 20 seconds, to conserve energy. The dedicated analog display on the right shows the battery level and mode. The small digital display can show hours, minutes, seconds, AM/PM, month, date, and day. Hand shift feature which allows you to move the analog hands out of the way to provide an unobstructed view of the digital display.Daily Alarms: Each will sound every day at the time you set, Hourly time signal: The watch beeps every hour on the hour

The daily alarm reminds you about recurring events with an acoustic signal at the time you have set. This model has 5 independent alarms for flexible reminders of important appointments. Overall, the new GMB2100 dial is another level above the GM2100, however, the solar-powered recharging system necessitates a translucent material and thus prevents the application of a brushed or sunburst finish on the dial, whereas the GM2100 does feature a nice vertical brushed treatment. Also, the higher-end GMB2100 comes with a monotone color scheme, which looks menacing but is perhaps not as legible as the silver dial seen on the GM2100. The high-brightness double LED light can be set to illuminate the dial for 1.5 or 3 seconds, at the push of a button, and includes afterglow. This is the same for both the GMB2100 and the GM2100. Furthermore, both models have a flat mineral crystal that’s sunken below the plane of the bezel, meaning neither is likely to scratch. A mixture of vapor deposition and grind mark finishing on the outer ring and indices, respectively, adds a luxurious texture to the dial. On The WristEven with a mobile Bluetooth connection, the movement is accurate to -/+ 15 seconds per month. The approximate battery operating time is 7 months when fully charged, with normal use, even without light exposure, and 18 months when stored in total darkness and the power save mode activated. Synthetic resin is the ideal material for wrist straps thanks to its extremely durable and flexible properties.