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Japan : 6/22 17:35   EN
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Order within 6 Hours 24 mins with Scheduled Delivery. If you place an order within this time, We will ship on Thursday, Jun 25 2026 This delivery time is calculated by DHL and FedEx. You can check the exact delivery date on checkout page.

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     Description (3,015 characters)
The G-SHOCK MASTER OF G series supports activities in harsh environments
The black body, which symbolizes toughness, is accented with vivid emergency colors to express the worldview of professionals taking on tough missions at rescue sites and other such situations.
We use MUDMASTER's GWG-B1000, MUDMAN's GW-9500, and GR AVITYMASTER's GR-B300 to support our activities on land and in the air.
The MUDMASTER GWG-B1000EC is shock-resistant, dust-proof, mud-proof, and vibration-resistant, and is equipped with Bluetooth® radio solar and triple sensors.
The fusion of different materials, such as carbon fiber reinforced resin and forged metal, creates a powerful design that is both durable and comfortable to wear.
It also has a location indicator function that shows the direction to your target location.
The MUDMAN GW-9500MEC is shock-resistant, dust-proof, and mud-proof, and is equipped with radio solar and triple sensors.
The use of a duplex LCD that improves the visibility of the direction display has increased the practicality of the digital compass.
In addition, stainless steel is used for the bezel parts.
Black IP finish gives it a bold design.
The GRAVITYMASTER GR-B300EC expresses an organic form inspired by next-generation aircraft with a seamless exterior design.
Carbon core guard structure and 3D wide face for durability, visibility, and comfort
It also comes equipped with practical functions such as dual time, which displays the time in two cities simultaneously, a flight log, which allows you to manage your travel history, and Bluetooth® radio-controlled solar power.
All three models use biomass plastic for the center case, bezel, and band.
This is a tough watch that supports quick decisions and precise actions.

- Shock-resistant structure
・ Tough Solar (solar charging system)
- 20 ATM water resistance
- Mobile Link function (function linkage via Bluetooth® communication with compatible mobile phones)
- Dual time (with home time swap function)
・ Stopwatch (1 second, 24 hour, split)
- Timer (set unit: 1 minute, maximum set: 24 hours, measured in 1 second units)
・ Electronic alarm
- Battery indicator display - Power saving function (hands stop moving after a certain period of time in a dark place to save power)
- Fully automatic calendar
- Date and day of the week display
・ LED light (Super Illuminator, with afterglow function)
・ Operating time from full charge without solar power generation When using functions: Approximately 5 months When in power saving mode: Approximately 18 months * When not linked to a smartphone, it operates with normal quartz accuracy (average monthly difference of ±15 seconds)

Model Number: GR-B300EC-1AJF


Tags:

Casio  Smartwatch  Silver  54mm  G-Shock Master of G GRAVITYMASTER GRB200  Casio G-Shock Men's Master of G  Casio G-Shock Gravitymaster HondaJet Collaboration GWR-B1000HJ-1A  


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CASIO G-SHOCK GRAVITYMASTER To... 4549526382079 The G-SHOCK MASTER OF G series supports activities in harsh environments
The black body, which symbolizes toughness, is accented with vivid emergency colors to express the worldview of professionals taking on tough missions at rescue sites and other such situations.
We use MUDMASTER's GWG-B1000, MUDMAN's GW-9500, and GR AVITYMASTER's GR-B300 to support our activities on land and in the air.
The MUDMASTER GWG-B1000EC is shock-resistant, dust-proof, mud-proof, and vibration-resistant, and is equipped with Bluetooth® radio solar and triple sensors.
The fusion of different materials, such as carbon fiber reinforced resin and forged metal, creates a powerful design that is both durable and comfortable to wear.
It also has a location indicator function that shows the direction to your target location.
The MUDMAN GW-9500MEC is shock-resistant, dust-proof, and mud-proof, and is equipped with radio solar and triple sensors.
The use of a duplex LCD that improves the visibility of the direction display has increased the practicality of the digital compass.
In addition, stainless steel is used for the bezel parts.
Black IP finish gives it a bold design.
The GRAVITYMASTER GR-B300EC expresses an organic form inspired by next-generation aircraft with a seamless exterior design.
Carbon core guard structure and 3D wide face for durability, visibility, and comfort
It also comes equipped with practical functions such as dual time, which displays the time in two cities simultaneously, a flight log, which allows you to manage your travel history, and Bluetooth® radio-controlled solar power.
All three models use biomass plastic for the center case, bezel, and band.
This is a tough watch that supports quick decisions and precise actions.

- Shock-resistant structure
・ Tough Solar (solar charging system)
- 20 ATM water resistance
- Mobile Link function (function linkage via Bluetooth® communication with compatible mobile phones)
- Dual time (with home time swap function)
・ Stopwatch (1 second, 24 hour, split)
- Timer (set unit: 1 minute, maximum set: 24 hours, measured in 1 second units)
・ Electronic alarm
- Battery indicator display - Power saving function (hands stop moving after a certain period of time in a dark place to save power)
- Fully automatic calendar
- Date and day of the week display
・ LED light (Super Illuminator, with afterglow function)
・ Operating time from full charge without solar power generation When using functions: Approximately 5 months When in power saving mode: Approximately 18 months * When not linked to a smartphone, it operates with normal quartz accuracy (average monthly difference of ±15 seconds)

Model Number: GR-B300EC-1AJF
113413
4549526382079 In Stock
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