{"product_id":"seiko-business-a-8346-8000-februar-1971-diashock-27-jewels-tag-datum-originales-armband-2026-revidiert","title":"Seiko Business-A 8346-8000 – February 1971 – Diashock 27 Jewels, Day\/Date – Original Bracelet – Serviced 2026","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\"Business-A\" – the name says it all regarding what this watch was built for: the Japanese office worker of the early 1970s who needed a reliable automatic with a full calendar and wore it every day. This example from February 1971 comes on its original bracelet and was serviced in Japan.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eThe Business line\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eSeiko's model designations in the 1960s and 1970s were programmatic: Seiko 5 stood for the robust everyday watch, Lord Matic for elevated aspirations, King Seiko and Grand Seiko for the pinnacle – and Business for the working day. The line was aimed at an audience that valued reliability and a full calendar display without the need for ostentation.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe caliber 8346 operates with \u003cstrong\u003e27 jewels\u003c\/strong\u003e and Diashock shock protection, displaying both the day and date. The jewel count is significantly higher than what was standard in this class, revealing the high standards Seiko applied even to its everyday lines.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe case back is stamped \u003cstrong\u003eSEIKO · WATER PROOF · SGP BACK · ST. STEEL · 8346-8000\u003c\/strong\u003e with the serial number 1229606, which dates the watch to \u003cstrong\u003eFebruary 1971\u003c\/strong\u003e. \"SGP\" stands for Seiko Gold Plated: the case is gold-plated, the back is stainless steel. We explicitly mention this so that the material composition is clear from the start.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eServiced \u003c\/h2\u003e\n\u003cp dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eThe watch was professionally disassembled and serviced in Japan in the spring of 2026.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eDesign and character\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe champagne-colored dial features a fine sunburst finish and appears to shift between light silver and warm gold depending on the light. Applied, gold-colored baton indices with dark center grooves sit atop it—a detail that adds depth to the indices and makes them stand out from the surface. The \"SEIKO\" signature is at 12 o'clock, with \"BUSINESS-A \/ DIASHOCK 27 JEWELS\" below at 6 o'clock. The combined day-date window at 3 o'clock is framed in gold.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe watch is delivered on its \u003cstrong\u003eoriginal Seiko link bracelet\u003c\/strong\u003e with finely crafted, tapered links that continue the warm tone of the case. For a watch over fifty years old, finding the original bracelet is by no means a given—it brings the watch to 76 grams and gives it the cohesive appearance for which it was designed.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe case measures 36.5 mm excluding the crown, with a lug-to-lug of 40.2 mm and a height of 11.3 mm—compact, classic proportions that work on almost any wrist.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eCondition\u003c\/h2\u003e\n\u003cp\u003eThe watch is in good condition and the gold plating is still largely intact. The crystal is free of major scratches. \u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eOperating note:\u003c\/strong\u003e The quick-set day and date should not be adjusted at night while the switching mechanism is engaged; set the hands to around 6 o'clock first.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eNote on the crown\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eManual winding via the crown feels noticeably stiffer on this watch than one might be used to with modern watches. Our watchmaker checked this during the service: the movement, winding mechanism, and crown are technically flawless; the slight stiffness is due to the delicate crown of this fifty-year-old construction and is not a defect. In daily use, the automatic movement winds itself through wrist motion, meaning the manual wind via the crown is only needed for the initial start after it has been sitting for a while.\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: Business-A\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eReference: 8346-8000\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCaliber: Seiko 8346\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eMovement: Automatic\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eJewels: 27 Jewels\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eShock protection: Diashock\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFunctions: Hour, minute, central second, day, date\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCase material: gold-plated (SGP), stainless steel back\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDiameter excluding crown: 36.5 mm\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eLug-to-lug: 40.2 mm\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eHeight: 11.3 mm\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eLug width: 18 mm\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eWeight incl. bracelet: 76 g\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSerial number: 1229606\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDating: February 1971\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eService: Serviced in spring 2026 \u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBracelet: original Seiko bracelet\u003c\/li\u003e\n\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eOrigin: Japan\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eFor whom?\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eFor anyone looking for a vintage automatic with a full calendar on its original bracelet without needing to source a matching strap. For collectors who appreciate Seiko's model hierarchy of the early 1970s and know the Business line for what it was: the watch that was actually worn. And for buyers who prefer 36.5 millimeters in gold over a larger steel case.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eWarranty (pre-owned)\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThis is a pre-owned item. The limitation period for claims for defects (statutory warranty) is 12 months from delivery.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\" class=\"mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eNote\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eAs this is a pre-owned watch, water resistance cannot be 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":54176319996242,"sku":"A400","price":479.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0911\/3908\/0530\/files\/B2F594E4-2F87-4C8C-B1A3-4C905EE368FA.jpg?v=1785935776","url":"https:\/\/japanese-microbrands.com\/en\/products\/seiko-business-a-8346-8000-februar-1971-diashock-27-jewels-tag-datum-originales-armband-2026-revidiert","provider":"Japanese Microbrands - Mario Lenke","version":"1.0","type":"link"}