【Product Description】 The Seiko Chronograph Ref. 8T63-00D0 is a quartz chronograph powered by Seiko’s Calibre 8T63 movement. It features a multi-register chronograph layout, date display, 24-hour indication, tachymeter scale, and push-button chronograph operation. The movement measures elapsed time for up to 60 minutes in 1/5-second increments, combining practical stopwatch functionality with quartz timekeeping. 【Historical and Collector Significance】 The Calibre 8T63 belongs to Seiko’s analogue quartz chronograph movement family and was used in a range of Seiko chronograph watches. The Ref. 8T63-00D0 combines a traditional multi-register layout with a date function, 24-hour indication, tachymeter scale, and practical quartz operation. Well-preserved examples may appeal to collectors and enthusiasts of Japanese quartz chronographs and Seiko sports watches from this period. 【Brand】 Seiko 【Model】 Chronograph 【Reference number】 8T63-00D0 【Movement】 Quartz 【Case dimensions】 Approx. 42 mm (excluding crown) 【Bracelet material】 Stainless steel 【Wrist size adjustment】 Adjustable from approximately 19.2 cm to 19.5 cm using the fine-adjustment holes on the clasp. Currently set to approximately 19.5 cm. No spare links included. 【Condition】 Case: Shows signs of wear and minor surface scratches consistent with regular use, but no significant damage. Please refer to the photos. Bezel: Shows signs of wear and minor surface scratches consistent with regular use, but no significant damage. Please refer to the photos. Dial: No noticeable damage; in good overall condition. Please refer to the photos. Crystal: No noticeable major damage; please refer to the photos for details. Bracelet: Shows signs of wear and minor surface scratches consistent with regular use, but no significant damage. Please refer to the photos. 【Crown and Chronograph Operation】 To adjust the date, pull the crown out one click from its normal position. To adjust the time, pull the crown out two clicks from its normal position. The button at the 2 o'clock position starts and stops the chronograph, while the button at the 4 o'clock position resets it. The quartz movement is functioning properly. Battery replaced in October 2026. 【Accessories included】 Watch only (no box or papers) 【Other notes】 Movement Japan / Cased in China 【Shipping】 Ships via ePacket / EMS or DHL with tracking. The estimated delivery time to Europe is approximately 7–21 business days after shipment.