Seiko quartz chronograph, calibre 7T92, reference 7T92-0CA0, running – black dial with 1/20-second, small-seconds and 60-minute registers, date at 3 o'clock, twelve-sided bezel with luminous plots, 5 bar, on its original Seiko steel bracelet. PLEASE NOTE: the watch has been worn and not cleaned. There are small brown traces in the hinge of the end link beside the clasp, dark deposit in the recess at the base of the 4 o'clock pusher, and the caseback carries a fine web-like pattern across its surface that looks like the residue of an old protective film, together with hairlines and a short cluster of scratches; all of this is described under Condition below. The code AL21003 in the seller's own title is not engraved anywhere on the watch – it is the seller's stock number; the serial number engraved on the caseback is 064376, and that is the number quoted below. The code printed at the foot of the dial, 7T92-0BZ4, differs from the case code 7T92-0CA0 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 5BAR and the dial 50M, 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 7T92 calibre, in stainless steel with a polished twelve-sided bezel set with square luminous plots – thirteen in all, doubled at 12 – and a black dial with a light radial sheen. The dial carries SEIKO and CHRONOGRAPH above the centre and 50M beside the date, with three registers on concentric-grooved sub-dials: a 1/20-second counter at 12 graduated 0 to 0.5, the running seconds at 9 and a 60-minute counter at 6. The hour markers are applied silver batons with a white luminous line, and the silver hour and minute hands carry matching luminous lines; the central chronograph seconds hand and the register hands are slim silver needles. The date sits at 3 o'clock in a framed window. The luminous plots on the bezel are still white, with no yellowing. The solid screw-down caseback is engraved with the case code and the serial number, and the bracelet is the original three-row Seiko bracelet with brushed outer links and a polished centre, with SEIKO on the clasp. Specifications - Brand: Seiko - Model: no model or line name appears on the watch; the dial reads SEIKO and CHRONOGRAPH - Reference number: 7T92-0CA0, engraved on the caseback - Serial number: 064376, engraved on the caseback – see the note above regarding the number in the title - Movement: quartz chronograph, Seiko calibre 7T92, with 1/20-second counter, 60-minute counter, small seconds and date - Date of manufacture: estimated at June 2010 from the serial number under Seiko's dating convention, consistent with the production period of the 7T92 calibre; Seiko's serial numbers repeat every ten years, so the year cannot be confirmed with certainty from the number alone - Case: stainless steel, with a polished twelve-sided bezel carrying thirteen square luminous plots, doubled at 12, a knurled unsigned crown at 3 and round pushers at 2 and 4. Solid screw-down caseback engraved SEIKO / 064376 / WATER RESISTANT 5BAR / ST. STEEL / 7T92-0CA0 / MOVEMENT JAPAN / CASED IN CHINA. 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: black with a light radial sheen, the sub-dials with a concentric groove pattern. Measured off the photographs with the white background in the same frame used to correct the white balance, the dial reads at a saturation of 3 to 8 per cent in the lit areas, a neutral black, with a brightness that moves between about 17 and 37 per cent as the light crosses the radial finish. - Dial printing: SEIKO and CHRONOGRAPH above the centre, 50M beside the date at 3 o'clock, and the dial code 7T92-0BZ4 R 2 at the foot of the dial - Registers: 1/20-second counter at 12 o'clock graduated 0 to 0.5; running seconds at 9 o'clock; 60-minute counter at 6 o'clock - Markers: applied silver baton markers with a white luminous line, wider at 12, and a white printed minute track. The luminous plots are on the bezel. - Hands: silver hour and minute hands with white luminous lines, a slim silver central chronograph seconds hand and slim silver register hands. The luminous material is white with no visible ageing; whether it still glows has not been tested. - Date: window at 3 o'clock with a frame, white disc with black numerals. There is no day – this is a date-only model. - Bezel: fixed polished twelve-sided bezel with thirteen square luminous plots, all present, white and firmly seated - Water resistance: 5 bar per the caseback and 50M per the dial, 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 polished centre links, with SEIKO engraved on the clasp cover. No other maker's name appears anywhere on it. Spring-blade folding clasp with five micro-adjustment holes. No spare links are included. - Lug width: approximately 20 mm, estimated from the photographs – to be confirmed by measurement - Wearable size: as linked the bracelet fits a wrist of approximately 180 mm, taken from the graduated cone in the photographs; the five micro-adjustment holes allow it to be shortened in small steps. No spare links are included, so it cannot be lengthened beyond this. - Weight: 108.74 g - Included accessories: none 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 are white and complete. - Bezel luminous plots: all thirteen present, white and firmly seated, with no yellowing. A few carry small specks of surface dirt. - Crystal: no scratches, chips or cracks were found. - Hands: all six straight and clean, with no corrosion. - Case and bezel: fine hairlines and light scuff marks on the bezel facets and the case flanks from normal wear. No dents and no distortion. - Caseback: hairlines across the whole surface, a short cluster of scratches at the lower right, and a fine web-like pattern that appears to be the residue of an old protective film, as described in the note above. The engraving is clear. - Crown and pushers: intact and correctly seated, with no chips or deformation. There is dark deposit in the recess at the base of the 4 o'clock pusher. - Corrosion: no green corrosion was found anywhere on the watch. For the brown traces at the clasp end of the bracelet, see below. - Bracelet and clasp: no broken or missing links. Hairlines and small scratches on the clasp cover and the links from normal wear. There are small brown traces in the hinge of the end link beside the clasp, which appear to be dirt from wear. The clasp closes and latches correctly. Stretch could not be assessed from the photographs. Working order The watch is running. The small seconds hand at 9 o'clock was checked against the timestamps of five photographs spanning 21 seconds: across the four intervals of 4, 8, 5 and 4 seconds it advanced by about 4, 9, 4 and 4 seconds respectively, so it is keeping time in one-second steps with no interruption. The central chronograph seconds hand, the 1/20-second hand and the 60-minute hand all sit at zero in every frame, correctly reset. The chronograph 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 and bracelet only. No box, papers, warranty card, spare links 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.