Decades before GPS and smartphones, Casio was already thinking ahead 🧭⌚ The Casio MAP-100 featured a tiny rolling gear on a swing-out arm that traced routes directly on paper maps. As the gear rolled, it converted movement into distance, letting users set the map scale and instantly see real-world mileage or kilometers on the digital display. A brilliant mix of mechanical ingenuity and digital calculation, this watch stands as one of the earliest wearable navigation tools—proof that true innovation existed long before satellite guidance. #casio #vintagetech #watchhistory #retrotech #technology