{"product_id":"seiko-galaxy-quarz-ref-5y31-5160-juli-1989-kissenform-mit-guillochiertem-zifferblatt","title":"Seiko Galaxy Quartz Ref. 5Y31-5160 – July 1989 – Cushion Case with Guilloche Dial","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eA cushion-shaped case, a dial whose fine guilloché pattern refracts light in waves—and at 12 o'clock, the emblem of a Seiko line that hardly anyone knows.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe case back bears the inscriptions SEIKO, BASE METAL, ST. STEEL BACK, the reference 5Y31-5160, and the serial number 978693. Above the 12 o'clock marker, the dial features the applied signet of the \u003cstrong\u003eGalaxy\u003c\/strong\u003e line.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eThe Galaxy Line\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eGalaxy was an upscale dress line within the Seiko quartz program, offered primarily in the late 1980s and early 1990s. It is characterized by flat cases, predominantly gold-toned, intricately structured or guilloché dials, classic two- or three-hand styling—and that very emblem at 12 o'clock.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eInformation on the Galaxy line is significantly scarcer than on King Seiko, Grand Seiko, or Credor; consequently, the line is not very prominent among collectors. In addition to this reference, models such as the 5Y39-7010, 5Y91-5010, V701-1K00, and V701-6K90 have been identified as part of the Galaxy line.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eA clarification, as confusion is common:\u003c\/strong\u003e The Galaxy emblem strongly resembles the contemporary Credor signet, and the two are regularly confused in collector circles. This watch is \u003cstrong\u003enot\u003c\/strong\u003e a Credor, but a Seiko Galaxy. We state this explicitly to avoid any ambiguity, both at the time of purchase and later on.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eCushion Shape and Guilloché\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe 1980s were the decade of the flat quartz watch in Japan. Competition shifted from movement engineering to design—resulting in case and dial shapes one would not expect from a watch in this price range.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe cushion shape is one such example: neither a circle nor a rectangle, but a square with softly rounded corners that appears broader on the wrist than it measures, while remaining just 5.7 millimeters thick.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe second is the dial surface. Instead of a smooth lacquer, the dial features a fine, uniform relief structure that reflects light in narrow bands. Such guilloché surfaces originate from classical watchmaking and were machine-applied here to a mass-produced watch—resulting in a dial that continuously changes as the wrist moves.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eDesign\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eSlender, applied baton indices sit on the guilloché surface at all twelve hours. The hands are long and delicate; there is a seconds hand, rendered as a thin line.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eAbove the 12 is the applied Galaxy signet, with the inscription SEIKO QUARTZ below it. The dial bears no further text.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe cushion-shaped case is finished in gold-tone throughout, with a narrow polished bezel framing the dial area. The lugs are designed as curved bars, giving the watch its characteristic silhouette. It comes on a new light brown leather strap with a crocodile grain.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003ePlease note: The case back indicates that the casing is base metal with a stainless steel back. The gold-toned finish is a plating.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eDating\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe serial number 978693 dates the watch to July 1989 according to the standard Seiko system. The first digit represents the year, the second the month.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eCondition and Provenance\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe watch originates from a Japanese watch specialty store and was inspected there prior to sale.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe dial is in very good condition: the guilloché pattern is complete and uniform; there are no spots, the indices are secure, and the hands are undamaged.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eSigns of wear are present on the case and should be explicitly noted: the gold-toned plating is rubbed off in places on the edges of the bezel and the lugs; the darker base material is visible in these areas. The crystal shows fine scratches. The case back is brushed and features fine scratches while the inscription remains fully legible.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe leather strap is new and unworn.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe actual condition is shown unretouched in the product photos.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul dir=\"ltr\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\"\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBrand: Seiko\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eModel line: Galaxy\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eReference: 5Y31-5160\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSerial number: 978693\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eProduction date: July 1989\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eMovement: Seiko caliber 5Y31, quartz\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFunctions: Hour, minute, second\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCase: Base metal with stainless steel back, gold-toned, cushion shape\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDimensions without crown: 29.7 × 29.5 mm\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eHeight: 5.7 mm\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eLug-to-lug: 36.5 mm\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eLug width: 19 mm\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWeight incl. strap: 23 g\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDial: gold-toned, guilloché, with applied baton indices and Galaxy signet at 12 o'clock\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eStrap: new light brown leather strap with crocodile grain\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eProvenance: Japan\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eWho is it for?\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eFor Seiko collectors who collect outside the well-known lines—Galaxy is documented but little explored, and those who seek it rarely find anything. For those who want a dial that plays with the light and accept visible signs of wear on the case in return. And for slender wrists.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eWarranty (used)\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThis is a used item. The limitation period for claims for defects under the statutory warranty is 12 months from delivery. The above-described abrasion of the coating is agreed upon as a condition of the item.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eWater Resistance Notice\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eWater resistance is not guaranteed. To protect the movement, the watch should not come into contact with water or moisture.\u003c\/p\u003e","brand":"Vintage \u0026 JDM (Japan Domestic Market)","offers":[{"title":"Default Title","offer_id":54204945924434,"sku":"A343","price":179.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0911\/3908\/0530\/files\/344AE787-A682-4FFC-BB76-2A8AA66E27A0.jpg?v=1786153452","url":"https:\/\/japanese-microbrands.com\/en\/products\/seiko-galaxy-quarz-ref-5y31-5160-juli-1989-kissenform-mit-guillochiertem-zifferblatt","provider":"Japanese Microbrands - Mario Lenke","version":"1.0","type":"link"}