When we talk about Casio divers, most modern enthusiasts immediately picture the iconic MDV-106 "Duro." It's the go-to recommendation for an ultra-affordable, reliable dive watch, often seen gracing the wrists of everyone from students to billionaires. But to truly appreciate the lineage and innovation that led to the Duro's ubiquity, we need to look back at its distinguished forebear: the Casio MDV-102. This less common, yet equally impressive "Marlin" diver holds a special place in Casio's rich history of robust, value-packed water-resistant timepieces. Casio's heritage in divers isn't as flashy as some Swiss marques, but it's built on a foundation of honest, no-nonsense utility. Long before G-Shocks dominated the extreme sports scene, Casio was producing highly capable water-resistant watches, often adorned with the "Marlin" logo—a symbol of genuine 200-meter water resistance. The MDV-102 is a proud member of this family, carryi...