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🛡 Authorized retailer • Manufacturer warranty included

G-SHOCK Gravitymaster GR-B300EC-1A

$330.00

Built for big wrists, fast reads, and a cockpit-inspired attitude.

The GR-B300EC-1A combines 200m water resistance. The standout here is how those functions are packaged in this specific case and finish, rather than another generic toughness story.

Our take

This is a tool watch first. The size and controls make sense if you will use the sensors or wear it outdoors. If you...

  • Sku: GRB300EC-1A
  • Available: In stock
  • Vendor: G-Shock
g-shock-gravitymaster-grb300ec-1a
G-SHOCK Gravitymaster GR-B300EC-1A
$330.00

Why Watch It?

AUTHORIZED RETAILER

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MANUFACTURER WARRANTY

Manufacturer Warranty, backed by the brand

30-DAY RETURNS

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Unworn itmes only. Excludes clearance items and gift cards.
★
4.5 ★ ON GOOGLE

Rated by Watch It clients

Built for big wrists, fast reads, and a cockpit-inspired attitude.

The GR-B300EC-1A combines 200m water resistance. The standout here is how those functions are packaged in this specific case and finish, rather than another generic toughness story.

Our take

This is a tool watch first. The size and controls make sense if you will use the sensors or wear it outdoors. If you want discreet, this is not the one.

Know before you buy

Case: 59 × 54.7 × 15.7. Water resistance: 200 meters. Crystal: Mineral Glass.

Open Technical Data for the full dimensions and materials, or Features for the function list.

  • Model: GRB300EC-1A
  • Collection: MASTER OF G - AIR
  • Strap Material: Resin
  • Strap Type: Strap
  • Case Material: Bio-based Carbon/Resin/Stainless Steel
  • Case Diameter (Mm): 59 × 54.7 × 15.7
  • Glass Material: Mineral Glass
  • Bezel Material: Bio-based Carbon/Resin/Stainless Steel
  • Shock Proof: Shock Resistant
  • Gross Weight (G): 71 g
  • Water Resistance: 200 meters


    • Time Adjustment: Bluetooth: Connects to a smartphone and automatically adjusts the time
    Apps: CASIO WATCHES
    App Connectivity Feature: Auto time adjustmentEasy watch settingApproximately 300 world time citiesFlight logPhone finder
    Shock resistant
    20 bar water resistant
    Keeps yourself in time
    Stable solar power
    Easy to operate via smartphone
    Check dual city time at a glance

    G-SHOCK, the watch that brought the new concept of toughness to the timepiece.
    It began with a reckless challenge to the conventional wisdom of the day, a developer’s belief that it was possible to construct a watch that wouldn’t break, even if dropped. Project Team Tough was formed to build it in 1981.
    The team created over 200 prototypes one after another over a period of about two years. They finally arrived at a shock-resistant structure. This marked the birth of a technology that is tough to the core.
    And G-SHOCK has continued its unceasing evolution ever since, in pursuit of greater toughness in every respect, from structure and materials to functions. Today, the development team’s passion for challenge and constant efforts have reached fruition in Triple G Resist, a structure with the strength to withstand 3 types of gravitational acceleration.

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