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G-Shock Full Metal Watch Black GM-B2100BD-1A
G-Shock Full Metal Watch Black GM-B2100BD-1A
G-Shock Full Metal Watch Black GM-B2100BD-1A
G-Shock Full Metal Watch Black GM-B2100BD-1A
G-Shock Full Metal Watch Black GM-B2100BD-1A
G-Shock Full Metal Watch Black GM-B2100BD-1A
G-Shock Full Metal Watch Black GM-B2100BD-1A
G-Shock Full Metal Watch Black GM-B2100BD-1A
G-Shock Full Metal Watch Black GM-B2100BD-1A
G-Shock Full Metal Watch Black GM-B2100BD-1A
G-Shock Full Metal Watch Black GM-B2100BD-1A
G-Shock Full Metal Watch Black GM-B2100BD-1A

G-Shock Full Metal Watch Black GM-B2100BD-1A

$648.46

(3,419 reviews)

The Casio GM-2100-1A G-Shock Metal Covered wristwatch combines a stainless steel case with a durable black plastic strap, offering a resilient men's watch. It features an analog-digital display with a gray dial, luminous hands and indices for better visibility in low light conditions, as well as a mineral glass for scratch resistance. Key functions include world time, a 1/100-second stopwatch, countdown timer, fully automatic calendar with day and date display, hourly time signal, and dual LED lighting. With a water resistance of 200 meters, it is suitable for swimming and snorkeling. The case measures approximately 44 mm in diameter and 12 mm in thickness, with a band width of 16 mm, and features a screw-down case back and a pin buckle for secure comfort. This model emphasizes reliability and practicality under demanding conditions.

The Casio GM-2100-1A G-Shock Metal Covered wristwatch combines a stainless steel case with a durable black plastic strap, offering a resilient men's watch. It features an analog-digital display with a gray dial, luminous hands and indices for better visibility in low light conditions, as well as a mineral glass for scratch resistance. Key functions include world time, a 1/100-second stopwatch, countdown timer, fully automatic calendar with day and date display, hourly time signal, and dual LED lighting. With a water resistance of 200 meters, it is suitable for swimming and snorkeling. The case measures approximately 44 mm in diameter and 12 mm in thickness, with a band width of 16 mm, and features a screw-down case back and a pin buckle for secure comfort. This model emphasizes reliability and practicality under demanding conditions.

G-Shock Full Metal Watch Black GM-B2100BD-1A

(3,419 reviews)

The Casio GM-2100-1A G-Shock Metal Covered wristwatch combines a stainless steel case with a durable black plastic strap, offering a resilient men's watch. It features an analog-digital display with a gray dial, luminous hands and indices for better visibility in low light conditions, as well as a mineral glass for scratch resistance. Key functions include world time, a 1/100-second stopwatch, countdown timer, fully automatic calendar with day and date display, hourly time signal, and dual LED lighting. With a water resistance of 200 meters, it is suitable for swimming and snorkeling. The case measures approximately 44 mm in diameter and 12 mm in thickness, with a band width of 16 mm, and features a screw-down case back and a pin buckle for secure comfort. This model emphasizes reliability and practicality under demanding conditions.

The Casio GM-2100-1A G-Shock Metal Covered wristwatch combines a stainless steel case with a durable black plastic strap, offering a resilient men's watch. It features an analog-digital display with a gray dial, luminous hands and indices for better visibility in low light conditions, as well as a mineral glass for scratch resistance. Key functions include world time, a 1/100-second stopwatch, countdown timer, fully automatic calendar with day and date display, hourly time signal, and dual LED lighting. With a water resistance of 200 meters, it is suitable for swimming and snorkeling. The case measures approximately 44 mm in diameter and 12 mm in thickness, with a band width of 16 mm, and features a screw-down case back and a pin buckle for secure comfort. This model emphasizes reliability and practicality under demanding conditions.

$648.46 - $1,728.00

in 20 offers

The lowest price for G-Shock Full Metal Watch Black GM-B2100BD-1A right now is $648.46 at Watchspree, compared across 13 retailers.

The all-time low was $429.00 on 19 Aug 2026 — today's price is 51% above the lowest ever. It has been notably cheaper before — worth setting a price alert.

Prices last updated 22 Aug 2026.

Price comparison

Price data powered by pricesAPI.io

Last updated at 22/08/2026 13:34:04

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
https://www.google.com/s2/favicons?domain=watchspree.com.sg&sz=64Watchspree

$648.46

Casio G-Shock GM-B2100 Lineup Full Metal Case Bluetooth¶ Tough Solar Black Ion Plated Stainless Steel Band Watch GMB2100BD-1A GM-B2100BD-1A|

Free delivery

https://www.google.com/s2/favicons?domain=zeuskicks.com&sz=64Zeus Kicks

$656.03

G-Shock GM-B2100BD-1ADR — 100% Genuine Casio, Best Price India

Delivery $29.14

https://www.google.com/s2/favicons?domain=ebay.com.au&sz=64eBay.com.au

$659.00

Casio Black Men's Watch Gm-b2100bd-1a Stainless Steel Analog Digital

Delivery $29.95

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

https://www.google.com/s2/favicons?domain=ebay.com.au&sz=64eBay.com.au

$711.36

Casio Shock Wristwatch Full Metal 2100 Series Solar Bluetooth Mobile

Delivery $47.03

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

https://www.google.com/s2/favicons?domain=ebay.com.au&sz=64eBay.com.au

$829.00

G-shock Solar Casioak Steel Bluetooth Gmb2100bd-1a

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

https://www.google.com/s2/favicons?domain=ebay.com.au&sz=64eBay.com.au

$899.99

Casio G-shock Casioak Full Metal Gm-b2100 Solar Watch All Black

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

https://www.google.com/s2/favicons?domain=ebay.com.au&sz=64eBay.com.au

$905.87

G-shock Gm-b2100bd-1a Full Metal Tough Solar Bluetooth Watch From

Delivery $53.90

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

https://www.google.com/s2/favicons?domain=ebay.com.au&sz=64eBay.com.au

$912.60

G-shock Gm-b2100bd-1a Full Metal Analog Digital Watch Bluetooth From

Delivery $53.90

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

https://www.google.com/s2/favicons?domain=ebay.com.au&sz=64eBay.com.au

$977.92

Casio G-shock Gm-b2100bd-1a Used

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

https://www.google.com/s2/favicons?domain=ebay.com.au&sz=64eBay.com.au

$1,041.94

Casio G-shock Gm-b2100bd-1a Tough Solar Bluetooth Watch From Japan

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

3 March 2022Osvaldo

originally posted on liverpool.com.mx

.

22 October 2022Rachel K.

originally posted on watchshop.com

This was a gorgeous watch but my husband decided to look for something different. Great service - thank you !

A impressively styled G-Shock that won't break the bank or your wrist.
2 January 2023Geof

originally posted on tillys.com

I really like G-Shock's designs, but they're most often far too large for my liking. I was about to finally pick up the G-2100 "Casioak" this Xmas, but then I saw this new design & immediately forgot the Casioak ever existed. The additional angles on the bezel look a bit like armor plating, but the smaller (for G-Shock) 46mm size still falls along the edge of tasteful watch size standards. And since the strap is integrated into the bezel, the watch wears much better than a 46mm should.As for features, this model has pretty much the same functions as most other G-Shocks: World Time, Stopwatch, Timer, Alarm, Bluetooth, etc., with the only really noticeably missing feature being Solar power. The negative digital display is a bit better than on other models, but still ... MoreI really like G-Shock's designs, but they're most often far too large for my liking. I was about to finally pick up the G-2100 "Casioak" this Xmas, but then I saw this new design & immediately forgot the Casioak ever existed. The additional angles on the bezel look a bit like armor plating, but the smaller (for G-Shock) 46mm size still falls along the edge of tasteful watch size standards. And since the strap is integrated into the bezel, the watch wears much better than a 46mm should.As for features, this model has pretty much the same functions as most other G-Shocks: World Time, Stopwatch, Timer, Alarm, Bluetooth, etc., with the only really noticeably missing feature being Solar power. The negative digital display is a bit better than on other models, but still not quite clear enough to be able to read the time/date/zone/etc. at a glance. And the Light feature, like most G-Shocks, is really just adequate.Other than the small digital display, light function, and lack of Solar, I'd say this is an excellent entry-level G-Shock. It's packed with features, affordably priced, and it'll fit on just about anyone's wrist. I ultimately chose the matte black version, but I think this design will look great in whatever color you choose (or Casio chooses to make over time.)

Specification

Case size (L× W× H)49.8 × 44.4 × 12.8 mm
Case / bezel materialStainless steel
Measuring modesElapsed time, lap/split timec
Countdown range60 minutes

Price comparison

Updated 7 days ago
Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
https://www.google.com/s2/favicons?domain=watchspree.com.sg&sz=64
Watchspree

$648.46

Out of stock

Casio G-Shock GM-B2100 Lineup Full Metal Case Bluetooth¶ Tough Solar Black Ion Plated Stainless Steel Band Watch GMB2100BD-1A GM-B2100BD-1A|

Free delivery

https://www.google.com/s2/favicons?domain=zeuskicks.com&sz=64
Zeus Kicks

$656.03

G-Shock GM-B2100BD-1ADR — 100% Genuine Casio, Best Price India

Delivery $29.14

https://www.google.com/s2/favicons?domain=ebay.com.au&sz=64
eBay.com.au

$659.00

Casio Black Men's Watch Gm-b2100bd-1a Stainless Steel Analog Digital

Delivery $29.95

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

https://www.google.com/s2/favicons?domain=ebay.com.au&sz=64
eBay.com.au

$711.36

Casio Shock Wristwatch Full Metal 2100 Series Solar Bluetooth Mobile

Delivery $47.03

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

https://www.google.com/s2/favicons?domain=ebay.com.au&sz=64
eBay.com.au

$829.00

G-shock Solar Casioak Steel Bluetooth Gmb2100bd-1a

Free delivery

Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!

Price history

Price history

Please note: price history and price alerts are not available for some stores, including Amazon.com.au.

Reviews

3 March 2022

.

Osvaldo originally posted on liverpool.com.mx
22 October 2022

This was a gorgeous watch but my husband decided to look for something different. Great service - thank you !

Rachel K. originally posted on watchshop.com
A impressively styled G-Shock that won't break the bank or your wrist.
2 January 2023

I really like G-Shock's designs, but they're most often far too large for my liking. I was about to finally pick up the G-2100 "Casioak" this Xmas, but then I saw this new design & immediately forgot the Casioak ever existed. The additional angles on the bezel look a bit like armor plating, but the smaller (for G-Shock) 46mm size still falls along the edge of tasteful watch size standards. And since the strap is integrated into the bezel, the watch wears much better than a 46mm should.As for features, this model has pretty much the same functions as most other G-Shocks: World Time, Stopwatch, Timer, Alarm, Bluetooth, etc., with the only really noticeably missing feature being Solar power. The negative digital display is a bit better than on other models, but still ... MoreI really like G-Shock's designs, but they're most often far too large for my liking. I was about to finally pick up the G-2100 "Casioak" this Xmas, but then I saw this new design & immediately forgot the Casioak ever existed. The additional angles on the bezel look a bit like armor plating, but the smaller (for G-Shock) 46mm size still falls along the edge of tasteful watch size standards. And since the strap is integrated into the bezel, the watch wears much better than a 46mm should.As for features, this model has pretty much the same functions as most other G-Shocks: World Time, Stopwatch, Timer, Alarm, Bluetooth, etc., with the only really noticeably missing feature being Solar power. The negative digital display is a bit better than on other models, but still not quite clear enough to be able to read the time/date/zone/etc. at a glance. And the Light feature, like most G-Shocks, is really just adequate.Other than the small digital display, light function, and lack of Solar, I'd say this is an excellent entry-level G-Shock. It's packed with features, affordably priced, and it'll fit on just about anyone's wrist. I ultimately chose the matte black version, but I think this design will look great in whatever color you choose (or Casio chooses to make over time.)

Geof originally posted on tillys.com
Great watch
24 May 2023

Nice everyday watch, the gold case and hands is a nice touch

g shock dude originally posted on very.co.uk
Service - great
20 August 2022

Always kept updated, great service. Perfect product, wonderful design.

TaylorP originally posted on debenhams.com

Specification

Case size (L× W× H)49.8 × 44.4 × 12.8 mm
Case / bezel materialStainless steel
Measuring modesElapsed time, lap/split timec
Countdown range60 minutes

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