Description
Description
The CASIO G-SHOCK GM-B2100BPC-1AJF represents a bold evolution of the iconic 2100 series, combining full metal construction with a striking rainbow-accented dial. Built on the octagonal “CasiOak” design, this model features an all-black ion-plated exterior contrasted by multi-color gradient indexes, expressing individuality through subtle yet dynamic color transitions. It reflects G-SHOCK’s philosophy of merging toughness with expressive design.
Powered by Tough Solar technology and equipped with Bluetooth connectivity, the watch ensures accurate timekeeping through smartphone synchronization while maintaining energy efficiency. It includes essential functions such as world time, stopwatch, timer, and multiple alarms, all housed within a shock-resistant structure and 200-meter water resistance.
Designed for those who seek both durability and standout aesthetics, the GM-B2100BPC-1AJF delivers a premium wearing experience with its solid metal weight and refined finishing. As a JDM-exclusive model, it holds strong appeal for collectors and enthusiasts looking for a distinctive, limited-style full metal G-SHOCK.
Key Specifications
- Case: 49.8 × 44.4 × 12.8 mm, approx. 165g, stainless steel (IP black coating)
- Bezel: Stainless steel, ion-plated (black)
- Band: Stainless steel bracelet, one-touch 3-fold clasp
- Water resistance: 200m (20 ATM)
- Movement: Tough Solar (solar-powered quartz module)
- Battery/Power: Approx. 7 months (normal use), 18 months (power saving)
- Accuracy: ±15 seconds/month (without Bluetooth sync)
- Display: Analog-digital combination (black dial with rainbow accents)
- Functions: Bluetooth (Mobile Link), world time (38 cities), stopwatch (1/100 sec), timer, 5 alarms, full auto calendar
- Special features: Shock resistance, smartphone link, hand shift feature
- Illumination: Double LED light (Super Illuminator)
- Additional: Mineral glass
- Origin: Japan Domestic Market (JDM)
- Warranty: 1 year (Casio standard)
- JAN/Model Code: GM-B2100BPC-1AJF
- Release date: 2023
Key Highlights
The GM-B2100BPC-1AJF stands out in the full metal G-SHOCK category by introducing a “rainbow accent” concept within an all-black chassis. Unlike typical colorful models, the subtle gradient indices provide a refined yet expressive identity, making it both wearable and visually distinctive.
With Bluetooth synchronization and Tough Solar power, this model offers a “set-and-forget” experience, eliminating the need for battery replacement while ensuring precise timekeeping across global time zones. It combines modern smart functionality with traditional G-SHOCK toughness.
On the wrist, the full metal construction delivers a premium, substantial feel that elevates the 2100 series into the luxury sports watch segment. The octagonal bezel design maintains the iconic G-SHOCK DNA while offering a more refined, urban aesthetic.
Within the global market, this model is highly regarded as a standout variant of the metal CasiOak lineup. Its JDM positioning and unique color execution make it particularly attractive to collectors seeking a distinctive yet versatile statement piece.




