The CASIO QW-1643/1613 WATCHES 1997 are a pair of digital wristwatches released by Casio in 1997. These watches were known for their durable construction, advanced features, and affordable price point, making them popular choices for both casual and active wearers. The QW-1643 and QW-1613 models shared many similarities, but differed in their aesthetic styling. The QW-1643 typically featured a more rugged, sporty design, while the QW-1613 offered a sleeker, more minimalist appearance. Both models boasted a range of practical functions, including a chronograph, alarm, countdown timer, and multiple time zones. The watches were also equipped with an EL backlight for improved visibility in low-light environments. Casio's commitment to reliability ensured that these watches could withstand the rigors of everyday life, making them a reliable companion for any adventure. While no longer in current production, the CASIO QW-1643/1613 WATCHES 1997 remain sought-after by collectors and enthusiasts who appreciate their classic design, durable construction, and nostalgic appeal. If you are fortunate enough to own one of these watches, a comprehensive repair manual can be an invaluable resource for keeping your timepiece in tip-top condition. The manual provides detailed instructions, diagrams, and parts lists, enabling you to diagnose and repair any issues that may arise.