The Casio G-SHOCK GM-2100 Series combines the iconic octagonal G-SHOCK design with a premium metal-clad bezel for a refined yet rugged appearance. Forged from stainless steel and finished with meticulous polishing, the bezel is paired with a detailed metallic dial that enhances the watch's modern style. Despite its slim profile, the GM-2100 Series retains G-SHOCK's legendary shock-resistant construction and 200-meter water resistance for dependable everyday performance. Equipped with practical features including world time, stopwatch, countdown timer, multiple daily alarms, double LED illumination, and a full auto calendar, the GM-2100 Series blends premium craftsmanship with reliable functionality.
Key Features:
• G-SHOCK GM-2100 Series
• Analog-Digital display
• Iconic octagonal bezel design
• Forged stainless steel bezel
• Metallic-finish dial
• Shock Resistant construction
• 200-meter water resistance
• Mineral Glass
• Neobrite
• Slim case design
• World Time (31 time zones, 48 cities + UTC)
• 1/100-second Stopwatch
• Countdown Timer
• 5 Daily Alarms
• Hourly Time Signal
• Double LED Light (Super Illuminator)
• Selectable illumination duration
• Afterglow
• Full Auto Calendar (to year 2099)
• Hand Shift Feature
• Button operation tone On/Off
• 12/24-hour time format
• Approx. 3-year battery life
• Easy to see in darkness
• Beautiful polished metal
• Casual design
• Lightweight and durable
Technical Specification:
• Brand: Casio
• Series: G-SHOCK GM-2100 Series
• Models Covered: GM-2100B-4A, GM-2100CB-3A, GM-2100GC-1A, GM-2100MWG-1A
• Product Category: Analog-Digital Watch
• Gender: Not specified on the official product pages
• Case Size (L × W × H): 49.3 × 44.4 × 11.8 mm
• Weight: Approx. 72 g (may vary slightly depending on band material)
• Case & Bezel Material: Resin / Stainless Steel
• Band Material: Varies by model (Resin Band / Cloth Band / Bio-based Resin Band)
• Construction: Shock Resistant
• Water Resistance: 200-meter water resistance
• Glass Material: Mineral Glass
• Compatible Band Size: 145–215 mm (where specified)
• Other Exterior Feature: Neobrite
• Battery Type: SR726W × 2
• Battery Life: Approx. 3 years
• World Time: 31 time zones (48 cities + Coordinated Universal Time), daylight saving on/off, Home City/World Time city swapping
• Stopwatch: 1/100-second stopwatch; elapsed time, split time, 1st–2nd place times
• Countdown Timer: 1-second measuring unit; countdown range 24 hours; start time setting from 1 second to 24 hours (1-second, 1-minute, and 1-hour increments)
• Alarms: 5 Daily Alarms
• Hourly Time Signal: Yes
• Light: Double LED Light (Super Illuminator)
• LED light for the analog face
• LED backlight for the digital display
• Selectable illumination duration (1.5 or 3 seconds)
• Afterglow
• LED Color: White
• Calendar: Full Auto Calendar (to year 2099)
• Mute Feature: Button operation tone On/Off
• Accuracy: ±15 seconds per month
• Hand Shift Feature: Hands move away to provide an unobstructed view of the digital display
• Time Format: 12/24-hour
Regular Timekeeping
• Analog: 2 hands (hour, minute; minute hand moves every 20 seconds), 1 day dial
• Digital: Hour, minute, second, PM, month, date
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