Casio G-Shock CLASSIC GM-2100LXB-1A9ER

The LUXE BLACK line reinterprets the iconic 2100 series with a modern, essential, and sophisticated aesthetic. The metal bezel with an IP black finish and the black resin strap enhance its minimalist character, while gold accents on the recessed dials and vapor deposition treatment along the perimeter of the glass add depth and refined material contrasts.

The matte black dial with finely crafted texture reduces reflections and enhances the slender hands and markers, while maintaining the iconic G-SHOCK toughness.

Technical Specifications

Case

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

Power Supply

Battery: 2 × SR726W
Battery life: Approximately 3 years

Glass

Type: Mineral glass

Surface Treatment

Bezel: Black ion-plated

Strap

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

Exterior Features

Luminescence: Neobrite

World Time

Time zones: 31 time zones, 48 cities + Coordinated Universal Time (UTC)
Daylight saving time: On/off

Stopwatch

Type: 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, split time, 1st-2nd place times

Timer

Type: Countdown timer
Measuring unit: 1 second
Range: 24 hours
Start time setting: 1 second to 24 hours
Increments: 1 second, 1 minute, and 1 hour

Alarms and Hourly Time Signal

Alarms: 5 daily alarms
Hourly time signal: Yes

Illumination

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

Calendar

Type: Full auto-calendar
Validity: Up to the year 2099

Sound

Button operation tone: On/off

Accuracy

Accuracy: ±15 seconds per month

Other Functions

Time format: 12/24-hour format
Hand shift feature: Hands move out of the way to provide an unobstructed view of digital display contents.

Time Indication

Analog: 2 hands, hours and minutes; the minute hand moves every 20 seconds. 1 dial for day indication.
Digital: Hour, minute, second, PM, month, and date.