Introduction This auction features a high-performance Casio Pro Trek PRW-61Y, a cutting-edge outdoor watch that combines advanced technology with a commitment to environmental sustainability. As the first Pro Trek to incorporate bio-based plastics in its case, strap, and case back, this timepiece is designed for the modern adventurer who values both functionality and eco-consciousness. Its olive green "military" aesthetic makes it as stylish in the city as it is capable in the wilderness. Historical / Era context The Pro Trek series has long been the gold standard for outdoor watches, known for its "Triple Sensor" technology (Altimeter/Barometer, Compass, and Thermometer). The PRW-61 series marks a significant era in Casio’s history, moving towards sustainable manufacturing without compromising the legendary "Tough Movement" durability. Released in the early 2020s, it integrates Multi-Band 6 radio-controlled timekeeping and Tough Solar power, ensuring that the watch remains precise and powered by light alone, a pinnacle of modern quartz engineering. Condition The watch is running properly. Case: The bio-based plastic and stainless steel case is in very good condition, showing minimal signs of wear. The black ion-plated bezel is clean and sharp. Dial: The olive green dial is pristine, featuring a high-contrast combination of analog hands and a digital LCD display. The STN LCD provides excellent readability even in harsh light. Crystal: The mineral crystal is clear and free of significant scratches. Band: Equipped with its original soft urethane band made from bio-based plastics. It is comfortable, durable, and in excellent condition. An additional khaki nylon strap (origin unknown) is also included. Functions: All sensors (Triple Sensor Ver.3) and the Tough Solar charging system are functioning correctly. Specifications Brand: Casio Model: Pro Trek Reference: PRW-61Y (Module 5673) Movement: Tough Solar (Solar Powered) Case material: Bio-based plastic / Stainless Steel Case diameter: 44.2 mm (excluding crown/sensors) Dial color: Green (Olive) Band: Original rubber strap + extra nylon strap Wrist size: Adjustable (standard men's size) Closing note This Casio Pro Trek PRW-61Y comes as a comprehensive full set, including the original inner and outer boxes, instruction manual, warranty card, product tag, and an extra nylon strap. It is a robust, reliable, and environmentally friendly tool watch that is ready for any adventure. Please examine the photos carefully to appreciate the excellent condition of this modern outdoor timepiece before bidding.