Casio G-Shock GRAVITYMASTER GRB300-1A | Pilot Watch | Tough Solar | Bluetooth® F

The G-SHOCK GRAVITYMASTER GRB300-1A is more than a pilot watch — it’s a mission-ready aviation instrument engineered for the skies. Designed with inspiration drawn directly from next-generation aircraft cockpits, this timepiece delivers rapid legibility, intuitive operation, and uncompromising toughness. Its triple-layer 3-D dial, bold indices, and large numerals allow pilots to read critical information at a glance, while the mode indicator dial and rotary battery-level display mirror the logic of cockpit instrumentation. The Carbon Core Guard structure, built from carbon materials used in aircraft fuselages, ensures elite shock resistance without unnecessary weight. Powered by Tough Solar and enhanced with Bluetooth® smartphone connectivity, the GRB300-1A automatically maintains precise timekeeping and records flight log data including date, time, and location, viewable on a smartphone map. Dual time, 200-meter water resistance, and a Super Illuminator LED complete a watch built for aviation professionals, travelers, and anyone who demands uncompromising performance. The GRAVITYMASTER GRB300-1A doesn’t just keep time — it keeps you mission-ready.
Package Dimensions ‏ : ‎ 4.33 x 4.17 x 3.82 inches; 9.59 ounces
Item model number ‏ : ‎ GR-B300-1ACR
Department ‏ : ‎ mens
Batteries ‏ : ‎ 1 C batteries required. (included)
Date First Available ‏ : ‎ May 13, 2024
Manufacturer ‏ : ‎ CASIO
ASIN ‏ : ‎ B0D441T5LK
Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
Best Sellers Rank: #386,077 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #1,541 in Men’s Wrist Watches
Customer Reviews: 4.3 4.3 out of 5 stars (31) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });

Price last updated Mar 24, 2026 14:40:35 UTC. Availability and price subject to change. More info