Casio G-Shock CLASSIC GM-2100LXB-1AER

The GM-2100LXB combines a black IP-finished metal bezel with a black resin strap. Silver accents on the recessed dials and vapor deposition treatment along the perimeter of the glass enhance its depth and material presence. The LUXE BLACK line reinterprets the standard 2100 series in a modern and refined key. By eliminating any superfluous elements in favor of rigorous minimalism, this series aims for timeless beauty, immune to passing trends. Subtle contrasts come to life on the deep black tones, making the legendary G-SHOCK resistance the basis for a watch with a discreet and elegant presence. The matte dial features a fine texture that eliminates reflections and absorbs light. The new hour and minute hands, thin and with elongated proportions, are combined with redesigned indices with vapor deposition treatment, finding the perfect balance between readability and refined finishes. Every single detail of the dial has been designed to express the essence of a product created to last and be appreciated over time.

Technical Specifications

Case

Dimensions: 49.3 × 44.4 × 11.8 mm
Weight: 72 g
Case and bezel material: Resin and stainless steel
Structure: Shock-resistant
Water resistance: 20 bar (200 meters)

Power Supply

Battery: 2 x SR726W batteries
Battery life: Approximately 3 years

Strap

Material: Bio-based resin
Adjustable range: 145–215 mm

Glass

Type: Mineral glass

Surface Treatment

Bezel: Black ion-plated

Luminescence

Neobrite: Present

World Time

Time zones: 31 time zones, 48 cities + UTC
Functions: Daylight saving time on/off

Stopwatch

Type: 1/100-second stopwatch
First 60 minutes: 00'00''00–59'59''99
After 60 minutes: 1:00'00–23:59'59
Measuring unit: 1/100 second for the first 60 minutes; 1 second after 60 minutes
Measuring modes: Elapsed time, split time, 1st-2nd place times

Timer

Type: Countdown timer
Measuring unit: 1 second
Maximum interval: 24 hours
Start time setting: 1 second to 24 hours, with 1-second, 1-minute, and 1-hour increments

Alarms and Signals

Sound reminders: 5 daily alarms
Hourly time signal: Present

Lighting

Type: Double LED light
Dial: Super Illuminator, selectable duration of 1.5 or 3 seconds, afterglow
Digital display: LED backlight Super Illuminator, selectable duration of 1.5 or 3 seconds, afterglow
LED color: White

Calendar

Type: Full auto-calendar up to the year 2099
Analog display: 1 dial dedicated to the day

Mute Function

Volume off: Button operation tone on/off

Accuracy

Accuracy: ±15 seconds per month

Time Indication

Format: 12/24-hour
Analog: 2 hands for hours and minutes, with seconds indication; the hand moves every 20 seconds
Digital: Hour, minute, second, PM, month, and date
Hand shift feature: Hands move out of the way to provide an unobstructed view of digital display contents.