Seiko introduces a new line of watches in the Prospex collection, inspired by the beloved SPB143 model, featuring a host of technological, design, and construction improvements. This marks the inaugural appearance of the Calibre 6R55 in the Prospex collection. These new timepieces are meticulously enhanced to ensure water resistance up to 300m, a notable first for the Prospex collection's non-saturation diver's watches. A notable alteration is the relocation of the date window from the traditional three o'clock position to the space between four and five o'clock, resulting in a more symmetrical design and allowing for increased lumibrite filling, ensuring optimal legibility even in low-light conditions. The special edition of these watches includes an extra strap crafted entirely from recycled plastic bottles. Utilizing the traditional Japanese braiding technique known as Seichu, which holds significance in Japanese culture for its use in fabric designs. Highlighted attributes of this special edition include the Calibre 6R55 movement for precise timekeeping, and a three-fold clasp with a secure lock and push-button release mechanism, along with an extender for added convenience. The case, measuring 40.0 mm, promises a comfortable fit on the wrist. Additionally, the watch features a screw case back, a screw-down crown, and an anti-reflective coating on the inner surface of the glass, enhancing visibility. Furthermore, with water resistance up to 300 meters, these watches are well-equipped for aquatic adventures. - Special Edition - Calibre 6R55 - Three-fold clasp w/ secure lock, push button release with extender - Case size: 40.0 mm - Additional Polyester Band - Screw case back - Screw-down crown - AR coating on inner surface - 300 Meters Water Resistant