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Casio

Casio G-Shock GRAVITYMASTER GRB300-8A2 | Aviation-Inspired Pilot Watch | Bluetooth | Tough Solar | Dual Time | 200M Water Resistant

  • Based on 12 reviews
Condition: New
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Availability: Only 6 left in stock, order soon!
Fulfilled by Altivo Timepieces
Arrives Wednesday, Jul 1
Order within 3 hours and 45 minutes
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Description

Casio GRAVITYMASTER GRB300-8A2 – Inspired by Flight, Engineered for Extremes The GRB300-8A2 from the G-SHOCK GRAVITYMASTER collection pays homage to aviation with a futuristic HUD-inspired dial and cockpit aesthetics. The bezel's seamless-edge design and carbon core structure are drawn from next-gen aircraft engineering, delivering both visual impact and structural toughness. Featuring Bluetooth connectivity, Tough Solar charging, and a dual-time system, this pilot’s tool offers practical intelligence with bold visual cues. The standout 3D dial displays mode and battery info instantly, while its bio- based materials ensure a lightweight fit for long missions. Whether you’re in the cockpit, at sea level, or off the grid, the GRB300-8A2 is a masterclass in form-meets-function—ready to handle the toughest environments with 200-meter water resistance, shock-proof durability, and Super Illuminator LED lighting. Fly farther. Train harder. Push limits. The GRB300-8A2 is more than a watch—it’s flight gear for your wrist.

Package Dimensions ‏ : ‎ 4.33 x 4.09 x 3.86 inches; 1.1 Pounds


Item model number ‏ : ‎ GRB300-8A2


Department ‏ : ‎ mens


Batteries ‏ : ‎ 1 C batteries required. (included)


Date First Available ‏ : ‎ May 13, 2024


Manufacturer ‏ : ‎ CASIO


Best Sellers Rank: #1,557,679 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #6,457 in Men's Wrist Watches


#6,457 in Men's Wrist Watches:


Customer Reviews: 4.6 4.6 out of 5 stars (44)


Display: Analog


Watch Movement Type: Quartz


Additional Features: Alarm, Chronograph, Light Up, Perpetual Calendar


Power Source: Solar Powered


Strap Type: Two Piece


Water Resistance Depth: 200 Meters


Sport Type: Walking


Clasp Type: Tang Buckle


Water Resistance Level: Water Resistant


Embellishment Feature: Crystal


Closure Type: Buckle


Style Name: Modern


Shape: Round


Band Color: Gray


Dial Color: Gray


Theme: aviation


Face Style: Modern


Brand Name: Casio


Model Name: G-Shock


Included Components: Band


Model Number: GRB300-8A2


Series Number: 300


Item Weight: 0.5 Kilograms


Manufacturer: CASIO


UPC: 889232373157


Manufacturer Part Number: GR-B300-8A2


Age Range Description: Adult


Item Type Name: Sport Watch


Band Material Type: Resin


Case Material Type: Resin


Crystal: Mineral Glass


Case Diameter: 59 Millimeters


Band Width: 28 Millimeters


Case Thickness: 15.7 Millimeters


Bands: 1


Warranty Type: Limited


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Jul 1

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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It came exactly when it said it would. The product is great. It’s super simple to set up and it’s perfect for everyday use without any fear of it breaking. With the solar powered battery you never have to worry about a new battery. I highly recommend this watch.
Reviewed in the United States on February 2, 2026 by Michael Wyant
    • Another great G-Shock!
Great G-Shock watch! The color looks much better in person. The quality is excellent as the band is soft and pliable, the buckle works well, and the features are very intuitive. Tough solar charging charges the watch very quickly. I received it half charged and it only took about an hour sitting in a bright window sill to completely charge. A new feature for me is the Bluetooth connection for time updates. Download the Casio app and it’s very easy to add your watch and update it. Very intuative. I love this watch so much that I bought a second one in day-glo green. ... show more
Reviewed in the United States on August 27, 2025 by SAm
    • Love it
Good looking watch. Especially this color!
Reviewed in the United States on January 31, 2026 by Dimitri Tavshavadze
    • Buen producto
Buena calidad
Reviewed in the United States on September 11, 2025 by Muy buen producto, tal cual lo que se ofrece en la descripción.
    • Daily driver
This is now my go to watch. I have had Casios with small digital screens, date, time zone etc. which I couldn’t read without a magnifying glass and being in the exact right light. All analog is easy to read always. I traveled to my alternate time zone and it reset automatically. Also with dst. It was easy to sync with my phone. The app is so much easier than working through menus on the watch itself. ... show more
Reviewed in the United States on March 20, 2026 by Aaron P
    • For the price, excellent purchase.
Very easy to connect to your iPhone. Watch is very light. Really nice.
Reviewed in the United States on December 30, 2025 by Lonnie Goebel
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Buen reloj
Reviewed in the United States on April 20, 2026 by Angel Fernando ramirez amaya
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Great looking watch.
Reviewed in the United States on March 21, 2026 by Undra Peeples

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