Mens Casio G-Shock GSTB1000D-1A

Tough, innovative, functional beauty — reimagined in sharp, minimalist style.
The GST-B1000D carries on the G-SHOCK heritage of tough construction and design rooted in functional beauty, reconstructing this legacy to achieve a polished, sleek expression.
The bezel goes logo-free for a clean, modern look, while three separate finishes — vertical hairline, circular hairline, and mirror polishing — create a rich and sophisticated textural appeal that changes as light is reflected at different angles. The mirror- and hairline-finished solid stainless-steel band is paired with a tri-fold clasp also crafted from solid stainless steel. This sharp, flat design takes you from business meetings to casual settings to outdoor activities with ease.
We’ve incorporated details from the DW-5000C, the very first G-SHOCK, adding sporty touches like the original’s signature bezel shape and brick pattern. The GST-B1000D-1AJF features accent colours inspired by the first G-SHOCK: red symbolising the passion to take on challenges, blue representing water resistance, and yellow signifying outstanding shock resistance.
This is a timepiece built to be tough. A metal bezel guards against impact, while the carbon-reinforced resin case protects the module. Urethane buffering components where the metal band meets the case absorb shock and reduce stress on the joints — enhancing durability and ensuring a more secure connection. Adhesive glass bonding and a compact module design make for a slimmer, lighter watch, without compromising shock resistance. All of this comes together in an exacting combination of comfort, toughness, and everyday usability.
Compact form, minimalist design, and rugged performance — this timepiece is an all-around companion, ready for whatever comes your way.
Case size (L× W× H)
46.9 × 44.2 × 11.6 mm
Weight
118 g
Case and bezel material
Bio-based Carbon / Stainless steel
Band
Solid stainless steel band
One-touch 3-fold Clasp
Construction
Shock Resistant
Carbon Core Guard structure
Water resistance
200-meter water resistance
Time adjustment
Bluetooth: Connects to a smartphone and automatically adjusts the time
Power supply and battery life
Tough Solar (Solar powered)
Smartphone Link/App Connectivity Features
Smartphone Link feature
Mobile link (Wireless linking using Bluetooth®)
Apps
CASIO WATCHES
App connectivity feature
Auto time adjustment
Easy watch setting
Time & place
Phone finder
Exterior
Glass
Mineral Glass
Crown
Screw Lock Crown
Compatible band size
150 to 205 mm
Other
Neobrite
Watch Features
Stopwatch
1-second stopwatch
Measuring capacity: 29'59 (30 minutes)
Measuring mode: Elapsed time
Timer
Countdown timer
Measuring unit: 1 second
Countdown range : 30 minutes
Countdown start time setting range : 1 minute to 30 minutes (1-minute increments)
Alarm/hourly time signal
Daily alarm
Light
LED light (Super Illuminator)
Afterglow
Light colour
LED:White
Calendar
Full auto-calendar (to year 2099)
Energy saving feature
Power Saving (hands stop to save power when the watch is left in the dark)
Battery display/alert
Low battery alert
Run time
Approx. battery operating time:
5 months on rechargeable battery (operation period with normal use without exposure to light after charge)
18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
Accuracy
Accuracy: ±15 seconds per month (with no mobile link function)
Other features
Regular timekeeping:
Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 2 dials (24-hour, day)
Day indicator
Date display