{"product_id":"seiko-5-ref-6319-8100-cal-6319-mens-automatic","title":"Seiko 5, Ref. 6319-8100, Cal. 6319, Men’s Automatic, 1977","description":"\u003cp\u003eSeiko 5 Ref. 6319-8100 from 1977 stands out through its deep blue dial with fine diagonal striping, broad 38 mm stainless-steel case and 21-jewel Cal. 6319 automatic movement. The watch retains its original components, has been fully serviced, is fitted with a new brown leather strap and is currently running at approximately -6 sec\/day.\u003c\/p\u003e\u003ch2\u003eDeep Blue Dial with Fine Diagonal Striping\u003c\/h2\u003e\u003cp\u003eThe dial gives this Seiko 5 a noticeably different character from the plain silver and sunburst finishes more commonly associated with everyday 1970s automatics. Fine diagonal lines run across the dark blue surface, becoming more or less visible as the watch catches the light. Applied silver-tone baton markers sit cleanly against the darker background, with small aged luminous plots positioned near the outer ends of the hour indexes.\u003c\/p\u003e\u003cp\u003eThe applied SEIKO name and Seiko 5 emblem occupy the upper half of the dial, while AUTOMATIC is printed discreetly above 6 o’clock. A large framed day-date aperture at 3 o’clock adds the practical calendar display central to the Seiko 5 concept, with the colored day indication providing a small visual accent. Slim luminous-filled hands and a central seconds hand keep the display straightforward and highly legible without competing with the unusual striped dial surface.\u003c\/p\u003e\u003ch2\u003eBroad 38 mm Stainless-Steel Case with Short Vintage Proportions\u003c\/h2\u003e\u003cp\u003eThe stainless-steel case measures approximately 38 mm across and 42 mm lug to lug, producing a broad, compact stance on the wrist. Its angular shoulders and brushed upper surfaces give the watch substantially more visual presence than many smaller 1970s dress watches, while the short lug-to-lug dimension keeps the overall profile controlled. At 19 mm between the lugs, the strap remains well proportioned to the wide case.\u003c\/p\u003e\u003cp\u003eThe case retains clearly defined geometry, with brushed surfaces across the top and polished accents around the bezel and case edges. A new brown leather strap has been fitted, adding warm contrast against the cool blue dial and steel case while remaining clearly separate from the original watch components. The combination gives the watch a slightly dressier appearance without losing its distinctly late-1970s Seiko character.\u003c\/p\u003e\u003ch2\u003eSeiko Cal. 6319 — 21-Jewel Automatic Day-Date Movement\u003c\/h2\u003e\u003cp\u003eInside is Seiko Cal. 6319, a 21-jewel automatic movement from the broader 63-series family. It operates at 21,600 vibrations per hour and provides central sweep seconds together with quick-setting day and date functions. The caliber is closely related to Seiko’s well-known 6309 architecture, but with the higher 21-jewel specification used in the 6319 version.\u003c\/p\u003e\u003cp\u003eThe movement has been fully serviced and is currently running at approximately -6 seconds per day under present test conditions. That is a strong observed rate for a mechanical automatic from 1977, while remaining a current measurement rather than a permanent accuracy guarantee. A 12-month movement warranty is included. Buyers comparing similar pieces can also browse other \u003ca href=\"https:\/\/www.vintagewatchstudio.com\/collections\/automatic-vintage-watches\"\u003eautomatic vintage watches\u003c\/a\u003e.\u003c\/p\u003e\u003ch2\u003eA Late-1970s Seiko 5 with Strong Mechanical Character\u003c\/h2\u003e\u003cp\u003eRef. 6319-8100 comes from a period when Seiko was rapidly expanding its quartz technology while continuing to produce robust mechanical automatics for the Seiko 5 line. The 6319 represents that parallel mechanical tradition: practical day-date functionality, automatic winding and durable 63-series construction in a watch designed for regular everyday use.\u003c\/p\u003e\u003cp\u003eThis example is particularly appealing for the combination of its original watch components, unusual blue striped dial, substantial 38 mm case and serviced 21-jewel movement. It offers more visual personality than a conventional plain-dial Seiko 5 while retaining the straightforward usability that made the line so successful. Other examples from the marque can be found among our \u003ca href=\"https:\/\/www.vintagewatchstudio.com\/collections\/seiko-vintage-watches\"\u003evintage Seiko watches\u003c\/a\u003e.\u003c\/p\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSeiko\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eSeiko 5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003ctd\u003e6319-8100\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGender\u003c\/th\u003e\n\u003ctd\u003eMen’s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCaliber\u003c\/th\u003e\n\u003ctd\u003e6319\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduction Year\u003c\/th\u003e\n\u003ctd\u003e1977 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDial Color\u003c\/th\u003e\n\u003ctd\u003eDark Blue\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCase Diameter\u003c\/th\u003e\n\u003ctd\u003e38 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLug to Lug\u003c\/th\u003e\n\u003ctd\u003e42 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLug Width\u003c\/th\u003e\n\u003ctd\u003e19 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCase Material\u003c\/th\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMovement Type\u003c\/th\u003e\n\u003ctd\u003eAutomatic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAccuracy\u003c\/th\u003e\n\u003ctd\u003e-6 sec\/day\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStrap\u003c\/th\u003e\n\u003ctd\u003eNew brown leather strap\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFully Serviced\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOriginal Watch Components\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e12-month movement warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Seiko","offers":[{"title":"Default Title","offer_id":50538445439041,"sku":null,"price":270.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0668\/2768\/1857\/files\/seiko-5-6319-8100-cal6319-mens-automatic-1977.webp?v=1790439593","url":"https:\/\/www.vintagewatchstudio.com\/products\/seiko-5-ref-6319-8100-cal-6319-mens-automatic","provider":"Vintage Watch Studio","version":"1.0","type":"link"}