【Product Description】 The Seiko Chronograph Ref. 8T63-00D0 is a quartz chronograph powered by Seiko’s Calibre 8T63 movement. The watch features a multi-register chronograph display, a date function, and push-button chronograph operation. The Calibre 8T63 provides a stopwatch capable of measuring elapsed time for up to 60 minutes in 1/5-second increments, together with a 24-hour display and accurate quartz timekeeping. Depending on the specific variation, dial color, hands, indices, bezel design, and bracelet configuration may differ, while the fundamental chronograph functions and overall design of the Ref. 8T63-00D0 remain consistent. 【Historical and Collector Significance】 The Calibre 8T63 belongs to Seiko’s modern family of analogue quartz chronograph movements and was used across a range of Seiko sports and dress-sport chronographs. Its combination of a 60-minute chronograph, 1/5-second measurement, 24-hour display, and date function reflects Seiko’s practical approach to quartz chronograph design. The Ref. 8T63-00D0 was produced in several cosmetic variations, including different dial colors, while retaining the same basic movement and case reference. This makes individual examples of interest to collectors of Seiko quartz chronographs and Japanese watches from the period. 【Brand】 Seiko 【Model】 Chronograph 【Reference Number】 8T63-00D0 【Movement】 Quartz 【Case Dimensions】 Approx. 42mm (excluding crown) 【Bracelet Material】 Stainless steel 【Wrist Size Adjustment】 Adjustable from approximately 17.8cm to 18cm by adding or removing links and changing the fine-adjustment holes on the buckle. Currently set to 18cm. No spare links included. 【Condition】 Case: Shows signs of wear and surface scratches consistent with normal use, but no major damage (please refer to the photos). Bezel: Shows signs of wear and surface scratches consistent with normal use, but no major damage (please refer to the photos). Dial: No noticeable damage; in overall good condition (please refer to the photos). Crystal: No noticeable damage; in overall good condition (please refer to the photos). Bracelet: Shows signs of wear and surface scratches consistent with normal use, but no major damage (please refer to the photos). 【Crown and Chronograph Operation】 To set the date, pull the crown out one click from the normal position. To set the time, pull the crown out two clicks from the 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 correctly (battery replaced in September 2026). 【Included Items】 Watch only (no box or papers). 【Other Notes】 Made in Japan. 【Shipping】 Ships via ePacket / EMS or DHL international registered mail with tracking and insurance. The estimated delivery time to Europe is approximately 7–21 business days after shipment.