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Photo: Casio G-SHOCK website 
Photo: Casio G-SHOCK website
Casio G-SHOCK
Official brand · International
G-SHOCK GA-2100 and GM-B2100 octagonal-bezel models, official-brand alternatives to octagonal integrated-bracelet watches.
USD $110–$600Visit Casio G-SHOCK →
Builds from Casio G-SHOCK
Sold by Casio G-SHOCK
GA-2100-1A1
Quartz analog-digital · 45.4mm · Integrated bracelet (octagonal)
In the style of the Audemars Piguet Royal Oak Offshore Chronograph 43Original price not published by the brand
Integrated Sports BraceletOctagonal Integrated Bracelet
$110View build →
Not made by, affiliated with, or endorsed by Audemars Piguet.
Sold by Casio G-SHOCK
GM-B2100D-1A (full metal)
Solar quartz, Bluetooth · 44.4mm · Integrated bracelet (octagonal)
In the style of the Audemars Piguet Royal Oak Selfwinding 41Original price not published by the brand
Integrated Sports BraceletOctagonal Integrated Bracelet
$600View build →
Not made by, affiliated with, or endorsed by Audemars Piguet.
Listings captured from Casio G-SHOCK’s own site on 13 Oct 2026; confirm price and availability with the shop.