The Casio G-Shock (GA2100-1A1) got its nickname and catchy hashtag because of its social media popularity. With its simple yet tough G-Shock design, the hype-train for this watch caused a quick sellout. Despite its high-strength resin material, it is a mere 11.8 mm thin, the thinnest among G-SHOCK combination models. Enthusiasts branded the CasiOak as a $100 poor mans’ AP Royal Oak homage, but its functionality and durability, I’d say it is quite a bargain. Most CasiOaks seem to sell for $196 - $209 in about 3.4 days.