Casio G-Shock “CasiOak” Showdown: GA-2100 vs. GA-B2100 vs. GM-B2100 – The Ultimate 2025 Guide
The GA-2100 debuted in 2019 as the original “CasiOak,” with an octagonal bezel and Carbon Core Guard resin, and at 11.8 mm thick became the slimmest G-Shock ever. The GA-B2100, released in