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G-Shock GM-2100MG-1AER Moon Watch
G-Shock GM-2100MG-1AER Moon Watch
G-Shock GM-2100MG-1AER Moon Watch
G-Shock GM-2100MG-1AER Moon Watch
G-Shock GM-2100MG-1AER Moon Watch
G-Shock GM-2100MG-1AER Moon Watch
G-Shock GM-2100MG-1AER Moon Watch
G-Shock GM-2100MG-1AER Moon Watch
G-Shock GM-2100MG-1AER Moon Watch

G-Shock GM-2100MG-1AER Moon Watch

G-Shock GM-2100MG-1AER Moon Watch

$477.83

(2,773 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.

(2,773 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.

$477.83 - $1,424.00

in 9 offers

The lowest price for G-Shock GM-2100MG-1AER Moon Watch right now is $477.83 at eBay.com.au, compared across 6 retailers.

The all-time low was $437.00 on 12 Mar 2026 — today's price is 9% above the lowest ever. That's a little above the best price we've seen.

Prices last updated 15 Aug 2026.

Price comparison

Price data powered by pricesAPI.io

Last updated at 15/08/2026 04:14:21

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

$477.83

Casio Shock Casio Shock Earth Motif Model Ana Digi Quartz Gm 2100mg

Delivery $54.39

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!

eBay.com.au

$608.72

Casio G-shock Lunar Gold Gm-2100mg-1ajr Used Watch Excellent Condition

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!

eBay.com.au

$972.70

Brand Tag And Seal 'moon G' 'moon Surface Gold' Casio Shock Gm 2100mg

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!

eBay.com.au

$1,160.19

Casio Men's Watch G-shock Gm-2100mg-1ajr

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!

Chrono24.com.au

$746.00

Casio GM-2100MG-1AJR

Free delivery

ModeSens

$912.00

G-shock Analog-digital 'black Gold'

Delivery $291

kickscrew.com

$960.00

CASIO G-Shock Analog-Digital 'Black Gold' GM-2100MG-1A US Free

Delivery $66

StockX

$1,399.00

Casio G-Shock GM2100MG-1A

Delivery $34.95

Novelship

$1,424.00

Casio G-Shock GM2100MG-1A

Delivery between 21–25 Aug $134.22

Price history

Price history

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

Reviews

Moon watch
18 June 2022Anthony M.

originally posted on g-shock.co.uk

Light never worked

Really nice quality! Amazing
17 June 2022Georgi G.

originally posted on g-shock.co.uk

Really nice quality! Amazing

Scammers
17 January 2022

originally posted on g-shock.co.uk

Limited edition watches and the quantity keep increasing every 2 days. When I bought mine they had only 15 left in stock, 2 days later they have another 30... I`m very disappointed in the way they misguide their customers.

Specification

Time IndicationDigital
MechanismQuartz
Case MaterialStainless Steel + Carbon
Colour SphereDorado
Material of StrapResin

Price comparison

Updated 2 days ago
Please note: price history and price alerts are not available for some stores, including Amazon.com.au.
eBay.com.au

$477.83

Casio Shock Casio Shock Earth Motif Model Ana Digi Quartz Gm 2100mg

Delivery $54.39

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!

eBay.com.au

$608.72

Casio G-shock Lunar Gold Gm-2100mg-1ajr Used Watch Excellent Condition

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!

eBay.com.au

$972.70

Brand Tag And Seal 'moon G' 'moon Surface Gold' Casio Shock Gm 2100mg

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!

eBay.com.au

$1,160.19

Casio Men's Watch G-shock Gm-2100mg-1ajr

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!

Chrono24.com.au

$746.00

Casio GM-2100MG-1AJR

Free delivery

Price history

Price history

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

Reviews

Moon watch
18 June 2022

Light never worked

Anthony M. originally posted on g-shock.co.uk
Really nice quality! Amazing
17 June 2022

Really nice quality! Amazing

Georgi G. originally posted on g-shock.co.uk
Scammers
17 January 2022

Limited edition watches and the quantity keep increasing every 2 days. When I bought mine they had only 15 left in stock, 2 days later they have another 30... I`m very disappointed in the way they misguide their customers.

originally posted on g-shock.co.uk
👍🏻
18 June 2022

👍🏻

James A. originally posted on g-shock.co.uk

Specification

Time IndicationDigital
MechanismQuartz
Case MaterialStainless Steel + Carbon
Colour SphereDorado
Material of StrapResin

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