The G-SHOCK 2100 series has a look that stands out from traditional G-SHOCK watches. Its octagonal bezel, slimmer case and combination of analogue hands with a digital display give it a different personality while keeping the toughness the brand is known for.
This design has earned the collection an unusual nickname: CasiOak.
But what exactly does the name mean, and what makes the 2100 series different from other G-SHOCK models? Let's take a closer look at the design, starting with the CASIO GA-2100-1ADR.
Why Is It Called CasiOak?
CasiOak is a nickname created by watch enthusiasts by combining the words CASIO and Oak. It refers to the visual resemblance between the octagonal bezel of the G-SHOCK 2100 series and the distinctive shape associated with the Audemars Piguet Royal Oak.
The comparison is mainly about the overall silhouette. Both designs feature an eight-sided outline that gives the watch a recognisable appearance.
However, the GA-2100 has its own design history. CASIO's development team has explained that the octagonal shape draws on the design heritage of the original G-SHOCK DW-5000C. The 2100 series was developed to bring that familiar toughness into a slimmer, more contemporary analogue-digital design.
CasiOak is therefore a fan-created nickname, not an official CASIO model name or a collaboration with Audemars Piguet.
What Makes the G-SHOCK 2100 Design Different?
There are three main elements that define the 2100 series.
1. The Octagonal Bezel
The most recognisable feature is the eight-sided bezel surrounding the watch face. Instead of the traditional rounded or bulky appearance associated with many G-SHOCK models, the angular outline gives the 2100 a cleaner and more structured look.
It is a simple design choice, but it changes the overall character of the watch. The shape makes the 2100 recognisable even from a distance.
2. An Analogue-Digital Display
The 2100 series combines traditional watch hands with a digital display.
The hour and minute hands make checking the time familiar and straightforward, while the digital section provides additional information and access to useful functions.
The GA-2100-1ADR also features a separate day indicator, giving the dial a layered appearance without making it unnecessarily complicated.
This combination makes it a practical option for someone who likes the appearance of an analogue watch but still wants the convenience of digital features.
3. A Slimmer G-SHOCK Profile
Traditional G-SHOCK watches are often associated with large, prominent cases. The 2100 series takes a more streamlined approach.
The GA-2100-1ADR measures 48.5 × 45.4 × 11.8 mm and weighs approximately 51 grams.
Its Carbon Core Guard structure uses carbon-fibre-reinforced resin in the case construction. This helps provide rigidity and shock resistance while keeping the watch relatively thin and lightweight.
The result is a G-SHOCK that feels visually less bulky without abandoning the protection expected from the collection.
What Does the GA-2100-1ADR Offer Beyond Its Design?
The design might be what attracts people to the CasiOak, but the GA-2100-1ADR also offers practical everyday functions.
Some of its key features include:
-
Shock resistance: Built to handle everyday impacts.
-
200-metre water resistance: Suitable for swimming and water activities within its rated limits.
-
World Time: Covers 31 time zones and 48 cities.
-
1/100-second stopwatch: Useful for measuring elapsed time.
-
Countdown timer: Supports countdowns of up to 24 hours.
-
Five daily alarms: Helps manage reminders throughout the day.
-
Double LED illumination: Provides lighting for the analogue face and digital display.
-
Approximately three-year battery life: Powered by two SR726W batteries.
These features make it more than a watch chosen for its appearance. It retains the practical functions that have made G-SHOCK popular among everyday users.
Who Should Consider a CasiOak?
The G-SHOCK 2100 series is worth considering if you want a watch that combines a distinctive design with everyday practicality.
It can be a good choice for someone who:
-
Likes analogue watches but still wants digital functions.
-
Prefers an angular, modern case rather than a traditional round design.
-
Wants G-SHOCK protection in a relatively slim profile.
-
Needs a versatile watch that works with casual and everyday outfits.
-
Wants a recognisable G-SHOCK design without choosing one of the larger models.
It is also worth remembering that the GA-2100-1ADR is not a metal watch. Its case and bezel use carbon and resin, with a resin band. If you prefer a metal exterior, other variations in the wider 2100 family offer a different approach.
Discover the CASIO GA-2100-1ADR
The CasiOak nickname might have brought attention to the 2100 series, but its appeal goes beyond its resemblance to another watch design.
The octagonal bezel, analogue-digital display and slimmer construction give it a distinct identity within the G-SHOCK range. At the same time, it retains the shock resistance and useful functions that make it practical for everyday wear.
If you want to experience this design, explore the CASIO GA-2100-1ADR at iCasioStore.
Discover the design that gave G-SHOCK one of its most recognisable modern nicknames.
