Casio G-Shock "CasiOak" Pitch Black Review (GA-2100-1A1DR / G987): The Ultimate Stealth Timepiece
When Casio introduced the GA-2100 series, watch enthusiasts around the world took immediate notice.
Among the lineup, the Casio G-Shock GA-2100-1A1DR (G987)—commonly referred to as the "Pitch Black" or "All-Black" version—stands out as one of the most sought-after models.
Whether you are looking for a reliable daily driver, an understated tactical watch, or a modern street-style staple, the GA-2100-1A1DR delivers unmatched value.
👉 Buy Now:
First Impressions: Ultra-Slim Profile & Stealth Design
Traditional G-Shock watches are known for being chunky and rugged. The GA-2100-1A1DR shatters that stereotype while retaining every bit of shock resistance.
At just 11.8 mm thick, it ranks among the slimmest analog-digital G-Shocks ever produced.
The watch features a pitch-black monochrome theme. From the octagonal resin bezel to the dial indices, hands, and dark LCD screen, the blacked-out detailing gives it a clean, tactical vibe that effortlessly matches any outfit.
The watch immediately conveys:
Iconic Octagonal Bezel Design (The "CasiOak" Silhouette)
Monochromatic All-Black Pitch Black Colorway
Ultra-Slim 11.8mm Profile for Sleek All-Day Wear
Featherlight 51g Weight for Supreme Comfort
Carbon Core Guard Inner Structure for Peak Durability
Carbon Core Guard Technology & Built-in Durability
Despite its thin chassis, the GA-2100-1A1DR does not sacrifice toughness. Casio utilizes a Carbon Core Guard structure, encapsulating the inner module in a carbon-fiber reinforced fine resin case.
Key Specifications & Build Details
Model Number: GA-2100-1A1DR / G987
Case Dimensions: 48.5 × 45.4 × 11.8 mm
Weight: 51 grams
Case & Bezel Material: Carbon / Resin
Strap Material: Flexible Resin Band with Pin Buckle Clasp
Glass: Scratch-Resistant Mineral Glass
Water Resistance: 200 Meters (20 Bar) – suitable for swimming, water sports, and diving
Battery Life: Approximately 3 years (SR726W x 2)
Smart Features & Multi-Functional Performance
The GA-2100-1A1DR offers a hybrid analog-digital layout that combines traditional timekeeping with modern outdoor utility:
Double LED Light (Super Illuminator): Features independent high-brightness LEDs for both the analog face and digital LCD screen, ensuring effortless viewing in complete darkness.
World Time (31 Time Zones / 48 Cities): Track secondary time zones across the globe with daylight saving options.
1/100-Second Precision Stopwatch: Built for athletic timing, lap splits, and interval tracking.
Countdown Timer & 5 Daily Alarms: Stay on schedule with multiple daily alarm settings and countdown reminders.
Hand Shift Feature: With the push of a button, the analog hands temporarily move out of the way to give you an unobstructed view of the digital display.
Full Auto-Calendar: Automatically accounts for leap years and month lengths up to the year 2099.
Style & Wardrobe Versatility
Because of its slim proportions and all-black execution, the GA-2100-1A1DR is easily one of the most versatile watches in the G-Shock catalog:
Casual & Streetwear: Pairs naturally with hoodies, leather jackets, t-shirts, cargo pants, and sneakers.
Work & Smart Casual: Slips easily under button-down shirt cuffs thanks to its thin 11.8mm profile.
Fitness & Active Wear: Tough enough for cross-training, gym routines, trail runs, and water sports.
An Unbeatable Gift Choice
If you're looking for a timeless, highly respected gift for a watch enthusiast, sports lover, or style-conscious friend, the CasiOak GA-2100-1A1DR is a universally acclaimed option.
It makes a perfect gift for:
Birthdays, anniversaries, and personal achievements
Watch collectors seeking an iconic modern classic
Fitness enthusiasts and outdoor adventurers who need lightweight durability
Anyone who appreciates sleek, monochrome, tactical accessories
Who Should Buy This Watch?
This timepiece is ideal for:
Anyone wanting the iconic octagonal "CasiOak" style at an affordable price point.
Users who find traditional G-Shock watches too bulky and prefer a slim profile.
Buyers looking for an all-black, stealth-aesthetic daily watch.
Active individuals who require 200M water resistance and shockproof construction.
Key Reasons to Choose This Watch
Authentic octagonal G-Shock "CasiOak" aesthetic
Stealthy, pitch-black monochrome color scheme
Carbon Core Guard construction providing shock resistance with minimal weight
Professional 200M water resistance for swimming and water sports
Double LED Super Illuminator backlight for clear nighttime reading
Final Verdict
The Casio G-Shock GA-2100-1A1DR (G987) lives up to every bit of its hype. By combining a slim carbon-reinforced body, 200M water resistance, and an iconic octagonal all-black design, Casio created a instant classic that feels far more premium than its price tag suggests.
If you want a versatile, indestructible, and stylish timepiece that elevates your wrist game, the Pitch Black CasiOak is a must-have addition to your collection.
👉 Grab Yours Today:
Disclosure: This article contains an affiliate link. If you purchase through the link above, I may earn a commission at no additional cost to you.