Timex MK1 Aluminum 40 mm Watch TW2T10500

Hi, anonymous. Thank you for your feedback. We’re glad to hear the watch is keeping good time, though we're sorry to learn about the scratches on the crystal and the missing instructions. For your convenience, all user manuals can be found and downloaded directly from the product page on our website. Here is a direct link to the instruction manual for your model, which will guide you through the watch’s features and settings: https://timex.com/cdn/shop/files/990-096577-01.pdf?v=16284919339905199326. As with battery replacement, we recommend visiting a local jeweler or authorized watch repair kiosk. This ensures a professional handling, and it helps maintain the watch’s water resistance and proper compression sealing, especially important for safety compliance with Reese’s Law and to avoid potential damage during the process, as special tools are often required. Your comments are important, and we’ll be sure to share them with our team to help improve the unboxing experience. For more details about our warranty coverage and repair options, please visit timex.com/pages/warranty-repair. If you have any additional concerns or need further assistance, please don't hesitate to reach out to us at timexcustomercare@timex.com. We appreciate you choosing Timex!