Black Friday · Through November 30

Extra 10% off all watches

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Code WATCH10

Online only, through November 30, 2026 at 11:59 pm PT. One discount code per watch.

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G-Shock - Brand New

G-Shock Full Metal GM-B2100 Gold - GM-B2100GD-9A

  • Solar powered
  • 49.8 × 44.4 × 12.8 mm case
  • 200-m water resistance water resistant
Sale price $480.00
Regular price $600.00
Sold out

About this timepiece

Warm yellow-gold ion plating sets this G-SHOCK Full Metal GM-B2100 (ref. GM-B2100GD-9A) apart, a stainless steel 2100 we are thrilled to offer to anyone who likes toughness with a touch of luxury. Its steel bezel is shaped in three dimensions through a lengthy sequence of forging, cutting and polishing, then given circular hairlines across the top and a mirror polish on the slopes. A black face sits inside that golden frame, and the screw lock back completes a case built entirely in metal.

Tough Solar charges the watch from light, and Casio rates it for about seven months of normal use without light after a charge, or 18 months in darkness with power saving switched on. Over Bluetooth, the CASIO WATCHES app keeps the time adjusted automatically and adds easy settings, about 300 world time cities, Time & Place, reminders and a phone finder. It is shock resistant and water resistant to 200 meters, with a double LED light, a 1/100-second stopwatch, a 60-minute countdown timer and five daily alarms, and its solid steel band closes with a one-touch three-fold clasp.

Features

  • Yellow gold ion plating – coats the stainless steel bezel and band around a black face.
  • Forged, cut and polished bezel – circular hairline on top, mirror polish on the slopes.
  • Tough Solar – about 7 months of normal use per charge without light, up to 18 months with power saving.
  • Bluetooth smartphone link – auto time adjustment and phone finder through the CASIO WATCHES app.
  • Full-metal construction – stainless steel case, bezel and band with a screw lock back.

Specifications

  • Reference: GM-B2100GD-9A
  • Collection: 2100 Series
  • Gender: Men's
  • Movement: Tough Solar (solar powered)
  • Module: 5691
  • Display: Analog-digital
  • Case Size: 49.8 × 44.4 × 12.8 mm
  • Weight: 165 g
  • Case and Bezel Material: Stainless steel
  • Surface Treatment: Gold ion plated case; gold ion plated band
  • Band: Stainless steel band; solid band; compatible band size 150 to 205 mm
  • Clasp: One-touch 3-fold clasp
  • Construction: Shock resistant
  • Water Resistance: 200-meter water resistance (20 bar)
  • Glass: Mineral glass
  • Power Supply: Tough Solar (solar powered); power saving (display goes blank to save power when the watch is left in the dark); battery level indicator; approx. operating time on rechargeable battery: 7 months with normal use without exposure to light after charge, 18 months when stored in total darkness with the power save function on after full charge
  • Time Adjustment: Bluetooth: connects to a smartphone and automatically adjusts the time
  • Smartphone Link: Mobile link (wireless linking using Bluetooth®) with the CASIO WATCHES app: auto time adjustment, easy watch setting, approximately 300 world time cities, Time & Place, reminder, phone finder
  • 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: Countdown timer; measuring unit 1 second; countdown range 60 minutes; start time setting range 1 second to 60 minutes (1-second and 1-minute increments)
  • Alarms: 5 daily alarms; hourly time signal
  • Light: Double LED light: LED light for the face and LED backlight for the digital display (Super Illuminator, selectable illumination duration 1.5 or 3 seconds, afterglow); LED color: white
  • Calendar: Full auto-calendar (to year 2099)
  • Accuracy: ±15 seconds per month (with no mobile link function)
  • Hands / Display Details: Analog: 2 hands (hour, minute (hand moves every 20 seconds)), 1 dial (battery level, mode); Digital: hour, minute, second, pm, month, date, day; hand shift feature (hands move out of the way to provide an unobstructed view of digital display contents)
  • Other Features: 12/24-hour format; date/month display swapping; day display (days of the week selectable in six languages); button operation tone on/off; Neobrite
  • Case Back: Screw Lock Back

Timepiece History

G-SHOCK began with a developer's belief that a watch could be built not to break when dropped, and Project Team Tough was formed in 1981 to make it, working from Kikuo Ibe's concept. Over about two years the team built more than 200 prototypes around the "Triple 10" concept: 10-bar water resistance, surviving a 10-meter drop, and a 10-year battery. The DW-5000C that came out of that work debuted in 1983 with a hollow case that supports the core module at certain points, and G-SHOCK has kept building on that toughness idea ever since.

G-SHOCK launched the 2100 series in 2019 with the GA-2100, whose design concept is inherited from the DW-5000C and whose octagonal bezel carries a motif kept since the very first G-SHOCK. That first GA-2100 introduced the Carbon Core Guard structure, which uses carbon fiber-reinforced resin to strengthen the case from within. As the full-metal member of the 2100 family, the GM-B2100 recreates the octagonal bezel and dimpled band of the 1983 original entirely in metal.

  • Sold out

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Lease-to-own · Acima or Progressive No credit needed* · 90-day purchase option

Lease-to-own is not a loan or credit, so there's no APR. Your payment amount and schedule are set in your lease agreement and depend on your state and pay schedule. The lowest-cost way to own is the 90-day purchase option.

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  • Approvals up to $5,000
  • 90-day early purchase option (3 months in CA)
  • Own in 12, 18 or 24 months
  • Payments set around your payday
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  • No credit needed*
  • 90-day purchase option (3 months in CA)
  • 12 months to ownership
  • Weekly, bi-weekly or monthly payments
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