30 laps. I replaced the battery myself. Instruction manual and spring bars included. Light function confirmed. The glass surface has minor scratches but is clean. There is some peeling on the side, near the back (photos 4, 5). The reason for the issue is as follows: I performed a durability test. I submerged it in a bucket of water about 30cm deep for 3 hours > internal fogging occurred. I opened the back cover again and dried it, but the same thing happened. The O-ring (rubber ring) appears normal at first glance, but may be partially crushed. It can be used for everyday use where it won't get wet, or for parts. It's best not to use it for triathlons or winter sports. The battery has been replaced with a new CR-2016 (although it looks old in the photo). The urethane strap is broken and not included. As an option, for an additional 700 yen, I can include a replacement band purchased from Cainz Home (16mm lug width, new, with band replacement tool). If you would like this, please let me know before purchasing and I will adjust the price. I thought this method would be best for those who only want the parts, as they probably won't need the band. The date and time will be set.