G-Shock Bluetooth Watch GA-B2100CY-1A
Uncompromising Strength Meets Sophisticated Design Experience the perfect blend of style, functionality, and durability with the G-Shock CasiOak Carbon Core Guard GA2100-1A1. As an illustrious heir of the original DW-5000C introduced in 1983, this watch evokes G-SHOCK’s timeless appeal while pushing the boundaries of resilience. Signature Octagonal Form This model sports the unique octagonal shape reminiscent of the pioneering DW-5000C. The classic analog-digital timekeeping is seamlessly integrated into a straightforward, clutter-free design, without compromising the iconic G-SHOCK toughness. Thin Yet Robust With the high-strength resin material reinforced with carbon fibers, this watch boasts an impressively thin case. At just 11.8 mm, it stands as the thinnest among G-SHOCK combination models, offering a sleek profile without sacrificing robustness. Featuring the exclusive Neobrite technology, the GA-2100-1A and GA-2100-4A models deliver enhanced visibility in low-light conditions. Carbon Core Guard Structure The innovative carbon core guard structure provides advanced protection to the module. By enclosing it in a carbon case, the watch gains exceptional strength, crack resistance, and durability. This case is constructed with fine resin infused with carbon fibers, affirming the watch's commitment to enduring toughness.
Uncompromising Strength Meets Sophisticated Design Experience the perfect blend of style, functionality, and durability with the G-Shock CasiOak Carbon Core Guard GA2100-1A1. As an illustrious heir of the original DW-5000C introduced in 1983, this watch evokes G-SHOCK’s timeless appeal while pushing the boundaries of resilience. Signature Octagonal Form This model sports the unique octagonal shape reminiscent of the pioneering DW-5000C. The classic analog-digital timekeeping is seamlessly integrated into a straightforward, clutter-free design, without compromising the iconic G-SHOCK toughness. Thin Yet Robust With the high-strength resin material reinforced with carbon fibers, this watch boasts an impressively thin case. At just 11.8 mm, it stands as the thinnest among G-SHOCK combination models, offering a sleek profile without sacrificing robustness. Featuring the exclusive Neobrite technology, the GA-2100-1A and GA-2100-4A models deliver enhanced visibility in low-light conditions. Carbon Core Guard Structure The innovative carbon core guard structure provides advanced protection to the module. By enclosing it in a carbon case, the watch gains exceptional strength, crack resistance, and durability. This case is constructed with fine resin infused with carbon fibers, affirming the watch's commitment to enduring toughness.
Uncompromising Strength Meets Sophisticated Design Experience the perfect blend of style, functionality, and durability with the G-Shock CasiOak Carbon Core Guard GA2100-1A1. As an illustrious heir of the original DW-5000C introduced in 1983, this watch evokes G-SHOCK’s timeless appeal while pushing the boundaries of resilience. Signature Octagonal Form This model sports the unique octagonal shape reminiscent of the pioneering DW-5000C. The classic analog-digital timekeeping is seamlessly integrated into a straightforward, clutter-free design, without compromising the iconic G-SHOCK toughness. Thin Yet Robust With the high-strength resin material reinforced with carbon fibers, this watch boasts an impressively thin case. At just 11.8 mm, it stands as the thinnest among G-SHOCK combination models, offering a sleek profile without sacrificing robustness. Featuring the exclusive Neobrite technology, the GA-2100-1A and GA-2100-4A models deliver enhanced visibility in low-light conditions. Carbon Core Guard Structure The innovative carbon core guard structure provides advanced protection to the module. By enclosing it in a carbon case, the watch gains exceptional strength, crack resistance, and durability. This case is constructed with fine resin infused with carbon fibers, affirming the watch's commitment to enduring toughness.
Uncompromising Strength Meets Sophisticated Design Experience the perfect blend of style, functionality, and durability with the G-Shock CasiOak Carbon Core Guard GA2100-1A1. As an illustrious heir of the original DW-5000C introduced in 1983, this watch evokes G-SHOCK’s timeless appeal while pushing the boundaries of resilience. Signature Octagonal Form This model sports the unique octagonal shape reminiscent of the pioneering DW-5000C. The classic analog-digital timekeeping is seamlessly integrated into a straightforward, clutter-free design, without compromising the iconic G-SHOCK toughness. Thin Yet Robust With the high-strength resin material reinforced with carbon fibers, this watch boasts an impressively thin case. At just 11.8 mm, it stands as the thinnest among G-SHOCK combination models, offering a sleek profile without sacrificing robustness. Featuring the exclusive Neobrite technology, the GA-2100-1A and GA-2100-4A models deliver enhanced visibility in low-light conditions. Carbon Core Guard Structure The innovative carbon core guard structure provides advanced protection to the module. By enclosing it in a carbon case, the watch gains exceptional strength, crack resistance, and durability. This case is constructed with fine resin infused with carbon fibers, affirming the watch's commitment to enduring toughness.
in 10 offers
The lowest price for G-Shock Bluetooth Watch GA-B2100CY-1A right now is $185.00 at Shiels, compared across 9 retailers.
The all-time low was $163.16 on 11 May 2026 — today's price is 13% above the lowest ever. That's a little above the best price we've seen.
Prices last updated 27 Aug 2026.
Last updated at 27/08/2026 16:42:15
G-Shock GAB2100CY-1A Black & Caution Yellow - Shiels Jewellers
Free delivery
G-Shock GAB2100CY-1A Black & Caution Yellow
Free delivery between 1–4 Sept
Casio G-Shock CasiOak GA-B2100CY-1A Black Yellow Solar Bluetooth Men's Watch
Free delivery between 31 Aug – 8 Sept
Casio G-Shock CasiOak GA-B2100CY-1A Black Yellow Solar Bluetooth Men's Watch
Free delivery between Sat – Thu
G-shock Carbon Core Bluetooth Solar Black Colorful Accents Watch
Free delivery
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Casio G-Shock Caution Yellow Series Analog-Digital Black Watch GAB2100CY-1A
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G-Shock Casioak Caution Yellow Watch - GAB2100CY-1A
Free delivery between 4–9 Sept
G-Shock GAB2100CY-1A Black & Caution Yellow
Free delivery
G-Shock GAB2100CY-1A Black & Caution Yellow
Free delivery
G-SHOCK GAB2100CY-1A Black Watches
Free delivery
originally posted on reeds.com
Watch is nice overall. There’s a small gap between the band and case that is primarily noticeable because the watch and band is white.
originally posted on g-shock.co.uk
It fits perfectly, probably slightly more comfy than my Hidden Coast Casioak (6.75' wrist) , it wears v well being lower profile than you expect. It definately has a softer strap and case materials. I love its bright yellow 'Danger' colours, to me it looks like it might have been born from get together of Robot wars and JCB :))... or maybe a mutant android Hornet ? Its just great, I love it, especially as its Bluetooth and now simple to set up , especially for travel etc. Shame its not Solar, that would be killer !
| Caliber | 5689 |
| Approximate Case Diameter | 45.4mm |
| Approximate Case Thickness | 11.9mm |
G-Shock GAB2100CY-1A Black & Caution Yellow - Shiels Jewellers
Free delivery
G-Shock GAB2100CY-1A Black & Caution Yellow
Free delivery between 1–4 Sept
Casio G-Shock CasiOak GA-B2100CY-1A Black Yellow Solar Bluetooth Men's Watch
Free delivery between 31 Aug – 8 Sept
Casio G-Shock CasiOak GA-B2100CY-1A Black Yellow Solar Bluetooth Men's Watch
Free delivery between Sat – Thu
G-shock Carbon Core Bluetooth Solar Black Colorful Accents Watch
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!
Watch is nice overall. There’s a small gap between the band and case that is primarily noticeable because the watch and band is white.
It fits perfectly, probably slightly more comfy than my Hidden Coast Casioak (6.75' wrist) , it wears v well being lower profile than you expect. It definately has a softer strap and case materials. I love its bright yellow 'Danger' colours, to me it looks like it might have been born from get together of Robot wars and JCB :))... or maybe a mutant android Hornet ? Its just great, I love it, especially as its Bluetooth and now simple to set up , especially for travel etc. Shame its not Solar, that would be killer !
| Caliber | 5689 |
| Approximate Case Diameter | 45.4mm |
| Approximate Case Thickness | 11.9mm |
