G-SHOCK GM-B2100SD-1C - Full Metal Octagon
G-SHOCK GM-B2100SD-1C - Full Metal Octagon
Red and blue on a black dial is G-SHOCK's oldest colour signature, borrowed here for its most expensive octagon.
The GM-B2100SD is a Full Metal model in the 2100 Series, stainless steel case, bezel and bracelet with a one-touch three-fold clasp and a screw-lock back. This reference keeps the metal bare and puts the colour on the dial instead.
Black dial with red and blue accents under a steel bezel, silver bracelet, in a case 49.8 by 44.4 mm and 12.8 mm deep at 165 grams. Two hands sit over a small LCD with Neobrite on the markers. Module 5691 is Tough Solar powered and sets itself from the CASIO WATCHES app over Bluetooth, with world time, a stopwatch, a countdown timer and alarms. 200 m water resistant.
More contrast than the brushed version and more colour than the original. The liveliest dial in the full metal octagon line.
Perfect for: full metal octagon G-SHOCK watches, red and blue accent watches, steel bracelet solar watches.
Specifications
- Collection
- 2100 Series
- Case Diameter
- 44.4 mm
- Case Thickness
- 12.8 mm
- Case Material
- Stainless steel
- Crystal
- Mineral Glass
- Case Back
- Screw Lock Back
- Water Resistance
- 200 m (20 ATM)
- Dial Color
- Black
- Movement
- Solar
- Caliber
- Casio module 5691
- Functions
- World time, Stopwatch, Countdown timer, Alarm, Auto calendar, Bluetooth, Solar charging
- Strap / Bracelet
- Stainless Steel Band; Solid Band; One-touch 3-fold Clasp; Spring Bar adjustment
- Strap Color
- Silver
- Reference
- GM-B2100SD-1C
- Released
- 2025-07-15
- Case Size
- 49.8 x 44.4 x 12.8 mm
- Weight
- 165 g
- Finish
- Neobrite
- Construction
- Shock Resistant
- Band Size
- 150 to 205 mm
- Power
- Tough Solar (Solar powered)
- Accuracy
- ±15 seconds per month (with no mobile link function)
- Time Adjustment
- Bluetooth: Connects to a smartphone and automatically adjusts the time
- Calendar
- Full auto-calendar (to year 2099)
- Smartphone Link
- Mobile link (Wireless linking using Bluetooth®)
- Illumination
- Double LED light LED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) LED backlight for the digital display (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow)
- World Time
- World time 38 time zones (38 cities + coordinated universal time), city name display, daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping
- Stopwatch
- 1/100-second stopwatch Measuring capacity: 00'00''00~59'59''99 (for the first 60 minutes) 1:00'00~23:59'59 (after 60 minutes) Measuring unit: 1/100 second (for the first 60 minutes) 1 second (after 60 minutes) Measuring modes: Elapsed time, lap/split time
- Timer
- Measuring unit: 1 second Countdown range: 60 minutes Countdown start time setting range: 1 second to 60 minutes (1-second increments and 1-minute increments)
- Alarm
- 5 daily alarms; Hourly time signal
- Other Features
- Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.); 12/24-hour format; Date/month display swapping; Day display (days of the week selectable in six languages); Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (battery level, mode) Digital: Hour, minute, second, pm, month, date, day