Seiko quartz chronograph, calibre 8T63, reference 8T63-00D0, running – gloss black dial with silver hands and markers, 60-minute, small-seconds and 24-hour registers, date at 4.30, tachymeter bezel, 10 bar, on its original Seiko steel bracelet with five spare links. PLEASE NOTE: the watch has been worn and not cleaned. Dried yellow-brown grime sits along the side edges of four or five bracelet links nearest the clasp, and there are traces of brown dirt between the lugs and the end pieces and in the groove around the caseback. These are described under Condition below. No model or line name appears on the watch – the dial reads SEIKO and CHRONOGRAPH only – so none is claimed here. The code printed at the foot of the dial, 8T63-00E8, differs from the case code 8T63-00D0 engraved on the caseback: on Seiko watches the dial code identifies the dial and the case code identifies the case, so the two are not expected to match and the difference is not a sign of a replaced part. The caseback is marked WATER RESISTANT 10 BAR, but the gaskets have never been tested or replaced, so the water resistance is not guaranteed and the watch should be kept away from water. The crystal is not marked as sapphire anywhere, so no claim is made about its material. The chronograph hands sit correctly at zero, but the start, stop and reset functions have not been operated. The case diameter has been measured with a caliper at 40 mm. The lug width has not yet been measured and is given below as an approximation. Overview A Seiko quartz chronograph on the 8T63 calibre in stainless steel, with a fixed tachymeter bezel and a gloss black dial – measured off the photographs at a brightness of under 5 per cent, a deep, true black – set off by silver hands and markers. The dial carries SEIKO and CHRONOGRAPH below 12 and three registers with white-bordered rings: a 60-minute counter at 10, the running seconds at 6 and a 24-hour indicator at 2. The hour markers are applied faceted silver batons, doubled at 12, and the silver hour and minute hands carry a pale luminous line; the central chronograph seconds hand reads against a 1/5-second track at the edge of the dial. The date sits at the 4.30 position, white on black. The crown and the two pushers are silver, matching the hands. The solid screw-down caseback is engraved with the case code and the serial number, and the bracelet is the original Seiko three-row bracelet with brushed outer links and a polished centre row, with SEIKO on the clasp. Five spare links are included, enough to take the bracelet from its current short setting to a full-size fit. Specifications - Brand: Seiko - Model: no model or line name appears on the watch; the dial reads SEIKO and CHRONOGRAPH - Reference number: 8T63-00D0, engraved on the caseback - Serial number: 636604, engraved on the caseback - Movement: quartz chronograph, Seiko calibre 8T63, with 60-minute counter, small seconds, 24-hour indicator, 1/5-second central chronograph hand and date - Date of manufacture: estimated at March 2016 from the serial number under Seiko's dating convention, consistent with the production period of the 8T63 calibre - Case: stainless steel with brushed finish, a fixed steel bezel engraved with a tachymeter scale from 60 to 400, a silver crown at 3 and two silver pushers at 2 and 4. Solid screw-down caseback engraved SEIKO / MOVEMENT JAPAN / WATER RESISTANT 10 BAR / CASED IN CHINA / STAINLESS STEEL / 8T63-00D0 / 636604, with two small inspection marks. No sticker. No plating and no precious-metal hallmark anywhere. - Case diameter: 40 mm excluding the crown - Crystal: flat, with no scratches, chips or cracks found. The material is not marked anywhere – see the note above. - Dial: gloss black with no sunray. Measured off the photographs with the white background in the same frame used to correct the white balance, the dial reads at a brightness of 2 to 4 per cent across three sample points, so a deep, true black. - Dial printing: SEIKO and CHRONOGRAPH below 12; a 1/5-second track in white at the outer edge; MOV'T JAPAN and the dial code 8T63-00E8 R5 4 at the foot of the dial - Registers: 60-minute counter at 10 o'clock marked 15, 30, 45 and 60; running seconds at 6 o'clock marked 20, 40 and 60; 24-hour indicator at 2 o'clock marked 24, 6, 12 and 18, each in a white-bordered black ring - Markers: applied faceted silver baton markers, doubled at 12. The markers carry no luminous material. - Hands: silver hour and minute hands with a pale luminous line along the centre, a silver central chronograph seconds hand and silver register hands. Whether the luminous lines still glow has not been tested. - Date: window at the 4.30 position, white numerals on a black disc. There is no day – this is a date-only model. - Bezel: fixed stainless steel bezel with a tachymeter scale - Water resistance: 10 bar per the caseback, but the gaskets have not been tested – see the note above - Bracelet: original Seiko stainless steel bracelet, three-row design with brushed outer links and a polished centre row, fitted end pieces, and a push-button three-fold clasp with SEIKO on the cover. No other maker's name appears anywhere on it. Arrow-marked pin-and-collar links. - Lug width: approximately 20 mm, estimated from the photographs – to be confirmed by measurement - Wearable size: as currently linked the bracelet fits a wrist of approximately 140 mm, taken from the graduated cone in the photographs. With the five spare links fitted it reaches roughly 180 mm. - Weight: 101.73 g as fitted, not counting the spare links - Included: five spare bracelet links – one single link and a run of four Condition Very good, with minor signs of wear. - Dial: excellent. No stains, no crazing, no discolouration and no lifting of the markers were found under magnification, and the printing is sharp. The luminous lines on the hands are complete. - Markers: all present, firmly seated and free of corrosion. - Crystal: no scratches, chips or cracks were found. - Hands: all six straight and clean, with no corrosion. - Case and bezel: light hairlines from normal wear. No dents and no distortion. The tachymeter engraving is complete. - Caseback: light marks from normal wear and one tiny dot near the centre, which may be a speck of dirt or a pin-point mark. The engraving is clear. Traces of brown dirt in the groove around the edge. - Crown and pushers: intact and correctly seated, with no chips or deformation. - Corrosion: no rust and no green corrosion were found anywhere on the watch. - Bracelet and clasp: no broken or missing links. Fine hairlines on the clasp cover and the brushed outer links from normal wear. Dried yellow-brown grime along the side edges of the four or five links nearest the clasp, and brown dirt between the lugs and the end pieces, as described in the note above. The clasp closes and latches correctly. The five spare links are free of damage. Working order The watch is running. The small seconds hand at 6 o'clock was checked against the timestamps of five photographs spanning 34 seconds: across the intervals of 7, 2, 3 and 22 seconds it advanced in step with the elapsed time, and over the final 22-second interval by about 23 seconds, so it is keeping time in one-second steps with no interruption. The central chronograph seconds hand and the 60-minute hand sit at zero in every frame, and the 24-hour hand agrees with the time shown. The chronograph start, stop and reset functions, the date changeover, the timekeeping accuracy and the water resistance have not been tested with equipment, and the battery's remaining life is unknown. Please consider this a used quartz watch; the battery is a consumable part and may need replacing at some point. Included Watch, bracelet and five spare bracelet links. No box, papers, warranty card or other accessories. Shipping Ships from Japan. Registered and insured shipping, mainly via DHL or FedEx. Import duties or taxes may apply depending on the buyer's country. These charges must be paid by the buyer. No weekend shipping as courier pickups are unavailable on Saturdays and Sundays. Please feel free to contact me with any questions before placing your bid.