Probably , there is no secret that Casio G-Shock watches are among the most toughest and durable watches, no matter it's unique design or it's high quality performance. Personally, I prefer with G-Shock Military Inspired Series. There were four models available. The DW6900MS-1 (my favorite), DW5600MS-1, G9000MS-1 and GW200MS-1.
DW6900MS-1
This model has become a modern classic with its stealthy looks and universal appeal. What you get are shock resistance, 200M water resistance, EL backlight with afterglow, multi-function alarm, 1/100 second stopwatch, countdown timer, flash alert and 12/24 hour formats.
DougFNJ has posted a video review of his MIRB DW-6900MS-1.
The DW6900MS-1 has retails for about $100-$120.
DW5600MS-1
Fix up the original 5600 series, The DW-5600MS-1 features include shock resistance, 200M water resistance, EL backlight with afterglow, multi-function alarm, 1/100 second stopwatch, countdown timer, flash alert and 12/24 hour formats.
G9000MS-1
The G9000MS-1 is a "Mudman". It has dual timers and supposedly more resistant to mud, sand or oil from entering the watch or accumulating between the back case and wearer’s wrist.
GW200MS-1
The exclusivity of the G-Shock Frogman GW200MS-1 makes it the perfect addition to this military inspired series. As part of G-Shock’s Master of G series, the amphibious Frogman is the only model certified ISO200M water resistant.
I would recommend that you stay clear of any of the negative display`s if you work in underwater area, as they have reduced contrast levels, which makes them pretty much useless in low-light conditions. They are cool and very stealthy but as mentioned, also harder to read in difficult light conditions. In that case, the GW200MS-1 is perfect choice.
DW6900MS-1
This model has become a modern classic with its stealthy looks and universal appeal. What you get are shock resistance, 200M water resistance, EL backlight with afterglow, multi-function alarm, 1/100 second stopwatch, countdown timer, flash alert and 12/24 hour formats.
DougFNJ has posted a video review of his MIRB DW-6900MS-1.
The DW6900MS-1 has retails for about $100-$120.
DW5600MS-1
Fix up the original 5600 series, The DW-5600MS-1 features include shock resistance, 200M water resistance, EL backlight with afterglow, multi-function alarm, 1/100 second stopwatch, countdown timer, flash alert and 12/24 hour formats.
G9000MS-1
The G9000MS-1 is a "Mudman". It has dual timers and supposedly more resistant to mud, sand or oil from entering the watch or accumulating between the back case and wearer’s wrist.
GW200MS-1
The exclusivity of the G-Shock Frogman GW200MS-1 makes it the perfect addition to this military inspired series. As part of G-Shock’s Master of G series, the amphibious Frogman is the only model certified ISO200M water resistant.
I would recommend that you stay clear of any of the negative display`s if you work in underwater area, as they have reduced contrast levels, which makes them pretty much useless in low-light conditions. They are cool and very stealthy but as mentioned, also harder to read in difficult light conditions. In that case, the GW200MS-1 is perfect choice.