G-Shock GM-2100: A Metal-Covered Stainless Steel "CasiOak"
Amazon.com: Casio GM-B2100D-1AJF [G-Shock GA-2100 Series Full Metal Model with Smartphone Link] Men's Watch Shipped from Japan Aug 2022 Model : Clothing, Shoes & Jewelry
G-Shock GA-2100 Watches : Are They Worth It? - YouTube