Casio g shock frogman
The first FROGMAN with of ISO-certified 200m diving water resistance to be equipped with a depth meter. Feedback from professional divers who perform arduous underwater missions inspired the product engineers to provide superior diving specifications, including reliable sensor measurements during dives to as deep as 80m, outstanding water resistance and excellent practical utility. The result is a diver’s watch that helps experts perform to the highest limits of their ability. - Supporting pro divers with multi function as deep as 80m.
Wristshot of a Casio G-Shock Frogman. The pictured model is an older Frogman model "GW-200Z-1JF." The Frogman is a high-end model of the Casio G-Shock line of watches . It was one of the first models of the " Master of G " line, a line of G-Shock watches designed for special uses. The Frogman has an asymmetric shape and is attached eccentrically on its straps. It is specially made as a diving watch for scuba divers and is the only ISO 6425 -compliant G-Shock line with a 200 m Divers rating. The first Frogman model (DW-6300) was released in November 1993. While Casio started to use a newer, four-screw back plate for its watches around that time, the DW-6300 retained the older back plate design. In June 1995 a second generation Frogman model was released, the DW-8200. From then on the Frogman became very popular under G-Shock collectors and many special editions have been released. A unique model in the Frogman lineup is the limited edition MRG-1100-2. This model was part of the MR-G series, a high-end G-Shock line of metal watches. While all other G-Shock models are constructed with resin bezels and straps, the MRG-1100-2 is constructed completely of titanium. In April 1999 the DW-9900 model was introduced. This Frogman was slightly smaller than the DW-8200. For the next two years both DW-8200 and DW-9900 models were produced. The DW-9900 seems to be a less popular model as it was soon followed up with the solar-powered GW-200 models in June 2001. Except for the "Snake Killer" and the "Carbon Fiber Frogman" (GW-201-6JF and GW-201NT-1JF), this Frogman has the Tough Solar 2422 module. The last GW-200 series Frogman is the GW-200Z-1JF "Final Frogman" that was released in November 2009. The model has been around for at least seven years, longer than the DW-8200. Typically, the "GW" designation refers to G-Shocks that can receive time updates from radio signals which are commonly called, though incorrectly, "atomic signals" But, no Frogman has been equipped with this feature prior to the release of the GWF-1000. The GWF-1000 was introduced on September 2009 in Japan. It represents the fifth generation of the Frogman series. The GWF-1000 is now capable of receiving time updates from six locations worldwide (Mainflingen [Germany], Anthorn [England], Ft Collins [USA], Shangqiu [China] & Fukushima & Fukuoka/Saga [Japan]), while retaining ISO 6425 200 m water resistance, shock resistance, dive time measurement and solar power. It also incorporates a tide and moon graph function. Like the first generation Frogman, the GWF-1000 employs a stainless steel construction with the addition of diamond-like coating (DLC) to improve corrosion resistance. Casio launched their latest model, the GWF-D1000 at Baselworld 2016. This includes the references GWF-D1000-1 and GWF-D1000B-1 (blue color accents). Besides the usual features such as Tough Solar" light-powered movement and atomic clock radio signal accuracy control system, the watch has three sensors, namely, temperature, depth gauge, and compass. The watch will log your dive time, track your depth, record the water temperature, and log the data for up to 20 dives. Other unique feature is sapphire crystal. 
When talking about the ultimate all-digital G-Shock watch, the Frogman is always part of the conversation. It lost some ground recently to the feature-rich and value-minded Rangeman and is now more of a prestige watch than a practical choice, but to many fans it will always be Casio’s flagship G-Shock. The made-in-Japan Frogman has a reputation as one of the best built G-Shock watches and its limited edition models tend to have the most value as collectibles. The Frogman line has a rich history that goes back to the early 1990s. It was always known for being the lone ISO-compliant diving watch in the G-Shock lineup, having a screw-lock case back, and an extra-large, asymmetrical design. Those qualities live on in the GWF-1000 and GF-8250 models with stainless steel replacing the titanium cases of the previous generation, and they also have Tough Solar power, a tide graph, and moon age data. The GWF-1000 adds Multi-Band 6 radio wave timekeeping for the first time and has a DLC (diamond-like carbon) coating on the case back for rust and corrosion resistance. The size of the GWF-1000 is 58.3 x 52.8 x 18.0mm and the GF-8250 is 52.0 x 50.3 x 18.0mm. The list price of the GWF-1000 is $700 and the latest GF-8250 model was $530. With the GF-8250 series, Casio seems to be continuing the limited-edition Frogman tradition of the GW-200 series, though on a less frequent basis. While the standard GWF-1000 Frogman looks like it was inspired by 1995’s second-generation DW-8200 Frogman (but goes a lot bigger with the outer resin case), the GF-8250 is more of a direct revival of that model. Like the GWF-1000 it adds size and heft but remains very similar to the DW-8200 with the engraved G-Shock logo on the exposed stainless steel bezel and similar shapes and angles on the resin case. Update: In 2016 Casio released the GWF-D1000 Frogman , which retained a similar design as the GWF-1000 and added a water depth meter, compass, and thermometer. Billed as a Triple Sensor watch, the GWF-D1000 does not have an altimeter/barometer pressure sensor like other Triple Sensor G-Shock and Pro Trek watches. The GWF-D1000 is the largest Frogman yet and measures 59.2 × 53.3 × 18 mm. Casio America released the GWFD1000B-1 with a list price of $1,050. While the GWF-1000 appears to still be in production, it looks like the GF-8250 has been retired. Here are all the GWF-1000, GF-8250, and GWF-D1000 Frogman models ever released starting with the most recent. Japanese model numbers are used for consistency though many of the models were released internationally. This page will be updated as more models are released. Ebay links are included for convenience, but the older limited edition models are most likely unavailable. GWF-D1035B-1 Gold Tornado Frogman - November 2017. Part of the 35th Anniversary Gold Tornado Collection . Gold bezel lettering and gold accents. Dual-layer band with black outer layer and red inner layer. 35th Anniversary gold IP band keeper and case back. Mastermind World x G-Shock Frogman GWF-1000 - Model: 7W-SP-MMJ. October 2017 release in Tokyo Japan, and Kuala Lumpur, Malaysia. Stealth bezel with silver accents. Mastermind World logos on face, bands, band keeper, and case back. Skull and crossbones graphic on EL backlight.
World Time 31 times zones (48 cities + UTC), city code display, daylight saving on/off Moon Data (moon age of the specific data, moon phase graph) Dive time and surface interval measurement function Dive time: 1 second increments, up to 23:59`59 Surface interval: 1 minute increments, up to 47:59`59 Memory capacity: One set of data (dive time, dive start time and surface interval) 1/100 second stopwatch Measuring capacity: 23:59`59.99" Measuring modes: Elapsed time, split time, 1st-2nd place times