{"product_id":"seiko-shinkansen-class-923-doctor-yellow-t4-last-run-gedenkchronograph-nr-4244-von-5-000-ungetragen-mit-box-und-zertifikat","title":"Seiko × Shinkansen Class 923 “Doctor Yellow T4 – Last Run” – Commemorative Chronograph No. 4244 of 5,000 – Unworn with Box and Certificate","description":"\u003cp\u003eA commemorative chronograph limited to 5,000 pieces for the final run of the Shinkansen Doctor Yellow test train, set T4, on January 29, 2025, from Tokyo to Hakata. This piece is number 4244 and is unworn, with the original box, certificate, and the link segments removed at delivery.\u003c\/p\u003e\n\u003cp\u003eThe case back features an engraving of Doctor Yellow T4, the text \"Last Run January 2025,\" the numbering 4244\/5000, as well as the reference 8T63-04L0 and the markings WATER RESISTANT and STAINLESS STEEL.\u003c\/p\u003e\n\u003ch2\u003eThe Yellow Train\u003c\/h2\u003e\n\u003cp\u003eDoctor Yellow is the unofficial name for the Shinkansen test trains that JR Tōkai and JR West have used for decades to inspect tracks, overhead wires, and signaling equipment during regular operation. The trains are built to the same design as passenger trains, but in a bright yellow, without passengers, and without a published schedule.\u003c\/p\u003e\n\u003cp\u003eIt is precisely this unpredictability that has made the train an icon. According to Japanese folklore, seeing it by chance brings good luck. Children collect Doctor Yellow models, train stations sell Doctor Yellow sweets, and journeys are reconstructed and shared in forums.\u003c\/p\u003e\n\u003cp\u003eSet T4 of the 923 series was in service for three eras—Shōwa, Heisei, and Reiwa—ensuring operations on the line between Tokyo and Hakata. On January 29, 2025, it completed its final run. For a train that never carried a passenger, the farewell was remarkably public.\u003c\/p\u003e\n\u003cp\u003eSeiko, in collaboration with Premico, developed this commemorative watch, limited to 5,000 individually numbered pieces, exclusively for the Japanese market. It is now sold out.\u003c\/p\u003e\n\u003ch2\u003eDesign\u003c\/h2\u003e\n\u003cp\u003eThe dial directly translates the train's livery: a bright yellow base, overlaid with two blue arches that follow the decorative stripe of the Shinkansen set and span the entire dial.\u003c\/p\u003e\n\u003cp\u003eThree sub-dials in a contrasting yellow house the 24-hour hand, the running seconds, and the chronograph minute counter, with the date window positioned at three o'clock. The hour markers are applied, LumiBrite-coated batons. A tachymeter scale runs along the bezel—an obvious choice for a watch dedicated to a high-speed train.\u003c\/p\u003e\n\u003cp\u003eThe case is made of stainless steel, with polished pushers and a brushed link bracelet. The result is a watch that does not need to explain its origin if the viewer knows the train—and one that functions as a yellow chronograph even if they do not.\u003c\/p\u003e\n\u003ch2\u003eDating\u003c\/h2\u003e\n\u003cp\u003eThe watch was released in 2025 to mark the decommissioning of set T4. The case back engraving notes \"Last Run January 2025\" and the individual number 4244 of 5,000.\u003c\/p\u003e\n\u003ch2\u003eCondition and Provenance\u003c\/h2\u003e\n\u003cp\u003eThe watch comes from Japan and is unworn.\u003c\/p\u003e\n\u003cp\u003eThe dial, hands, crystal, case, and bracelet show no signs of wear. The case back engraving is complete and sharp. The factory protective film is still on the case back.\u003c\/p\u003e\n\u003cp\u003eIncluded are the original outer and inner box, the certificate stating the limitation, and the additional link segments removed at delivery, in their original bag. The bracelet can thus be extended for a larger wrist.\u003c\/p\u003e\n\u003cp\u003ePlease note: The Japanese manufacturer's warranty included with the model is tied to the Japanese service center. Your legal rights against us remain unaffected.\u003c\/p\u003e\n\u003cp\u003eThe actual condition is shown unretouched in the product photos.\u003c\/p\u003e\n\u003ch2\u003eTechnical Data\u003c\/h2\u003e\n\u003cul\u003e\n\n\u003cli\u003eBrand: Seiko (special model in collaboration with Premico)\u003c\/li\u003e\n\n\u003cli\u003eModel: Class 923 Doctor Yellow T4 – Last Run Memorial\u003c\/li\u003e\n\n\u003cli\u003eReference: 8T63-04L0\u003c\/li\u003e\n\n\u003cli\u003eLimitation: 4244 of 5,000, individually numbered\u003c\/li\u003e\n\n\u003cli\u003eMovement: Quartz chronograph, caliber 8T63\u003c\/li\u003e\n\n\u003cli\u003eAccuracy: ± 15 seconds per month (manufacturer specification)\u003c\/li\u003e\n\n\u003cli\u003eFunctions: Hour, minute, second, 24-hour hand, date, chronograph, tachymeter scale\u003c\/li\u003e\n\n\u003cli\u003eLuminous material: LumiBrite on hands and indices\u003c\/li\u003e\n\n\u003cli\u003eCase: Stainless steel\u003c\/li\u003e\n\n\u003cli\u003eDiameter excluding crown: approx. 41 mm\u003c\/li\u003e\n\n\u003cli\u003eHeight: 12.8 mm\u003c\/li\u003e\n\n\u003cli\u003eLug-to-lug: 46.6 mm\u003c\/li\u003e\n\n\u003cli\u003eLug width: 20 mm\u003c\/li\u003e\n\n\u003cli\u003eWeight incl. bracelet: 107 g\u003c\/li\u003e\n\n\u003cli\u003eCrystal: Domed Hardlex\u003c\/li\u003e\n\n\u003cli\u003eWater resistance: 10 bar (manufacturer specification)\u003c\/li\u003e\n\n\u003cli\u003eDial: Yellow with blue arches, three sub-dials\u003c\/li\u003e\n\n\u003cli\u003eBracelet: Original stainless steel link bracelet, additional links included\u003c\/li\u003e\n\n\u003cli\u003eExtras: Original box, certificate, spare links\u003c\/li\u003e\n\n\u003cli\u003eYear of issue: 2025\u003c\/li\u003e\n\n\u003cli\u003eMarket availability: Japanese domestic market only, sold out there\u003c\/li\u003e\n\n\u003cli\u003eOrigin: Japan\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2\u003eFor whom?\u003c\/h2\u003e\nFor railway collectors for whom the yellow train is more than just a vehicle. For Seiko collectors who keep limited Japanese special series that never left the domestic market. For anyone who prefers a numbered piece in delivery condition to a worn piece without packaging. And for buyers looking for a yellow chronograph that can justify its color.\n\u003ch2\u003eWarranty\u003c\/h2\u003e\nThis is a new, unworn item. The statutory warranty applies, with a limitation period of 24 months from delivery.\n\u003ch2\u003eNote on water resistance\u003c\/h2\u003e\nThe manufacturer's rating of 10 bar corresponds to suitability for swimming. The watch is not suitable for scuba diving. Water resistance is not a permanent feature and should be checked periodically if in regular contact with water.","brand":"Vintage \u0026 JDM (Japan Domestic Market)","offers":[{"title":"Default Title","offer_id":54206887362898,"sku":"A369","price":749.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0911\/3908\/0530\/files\/44F1FA33-01DE-4BA0-B9EF-1CDAB8D70DBA.jpg?v=1786157550","url":"https:\/\/japanese-microbrands.com\/en\/products\/seiko-shinkansen-class-923-doctor-yellow-t4-last-run-gedenkchronograph-nr-4244-von-5-000-ungetragen-mit-box-und-zertifikat","provider":"Japanese Microbrands - Mario Lenke","version":"1.0","type":"link"}