{"product_id":"seiko-5-sports-jdm-speed-timer-7017-6010-kaliber-7017-flyback-chronograph-mit-innenlunette-daini-seikosha-februar-1971-frisch-revidiert","title":"Seiko 5 Sports JDM Speed-Timer 7017-6010 – Caliber 7017, flyback chronograph with inner bezel, Daini Seikosha – February 1971 – freshly serviced","description":"\u003cp dir=\"ltr\"\u003ePress the bottom pusher, and the chronograph jumps back to zero—while continuing to run. No stopping, no resetting, no restarting. One press, and the measurement begins again.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThis is called \u003cstrong\u003eflyback\u003c\/strong\u003e. It is a complication that comes from aviation, where seconds counted, and which is otherwise found on watches that cost many times more.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eThe answer from Tokyo\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eIn 1969, Seiko’s \u003cstrong\u003eSuwa\u003c\/strong\u003e factory introduced the caliber 6139—one of the world's first automatic chronographs, which made the brand famous internationally.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eA year later, the competing \u003cstrong\u003eDaini\u003c\/strong\u003e factory in Tokyo responded with the caliber 7017.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eFor decades, Seiko maintained two completely separate production divisions that competed against each other—Suwa developed Grand Seiko, Daini developed King Seiko—and corporate management explicitly encouraged this. In the case of chronographs, this competition led to two completely different designs for the same task.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eDaini placed two points of emphasis that characterize the 7017 to this day:\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eIt was the thinnest.\u003c\/strong\u003e At 5.9 mm in height, the 7017 caliber set a world record for automatic chronograph movements at its introduction. Anyone who places a 6139 and a 7017 side by side can see the difference immediately.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eIt featured flyback.\u003c\/strong\u003e The 6139 cannot do that.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThis watch bears the lightning bolt of the Daini factory in two places: on the dial under the \u003cem\u003eWATER 70m PROOF\u003c\/em\u003e lettering and on the case back.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eThree hands, one ring – how the watch works\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eThis watch has only \u003cstrong\u003ethree hands\u003c\/strong\u003e: hour, minute, and the orange chronograph hand. There is no sub-dial, no minute counter, no small second. The dial surface remains exceptionally uncluttered—and this is the point where most people pause: How do you measure more than one minute with it?\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eVia the \u003cstrong\u003einternal rotating bezel\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe black ring with markings from 5 to 55 lies under the crystal and can be rotated. You set it to the minute hand at the start of the measurement; the orange hand tracks the seconds, the minute hand moves over the ring, and you read the elapsed time without having to calculate.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThis also makes the flyback function make sense. A chronograph designed for sixty seconds thrives on being able to restart quickly in succession—for split times, laps, intervals. That is exactly what the flyback reset accomplishes. Two features that seem unusual individually result in a logical instrument together.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThere is the added design advantage of the internal bezel over an external rotating ring: it cannot be adjusted accidentally, it does not collect dirt, it does not wear out, and it does not compromise the water resistance of the case.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eWhy you rarely see them\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eThe 7017 series was built only from \u003cstrong\u003e1970 to 1972\u003c\/strong\u003e, after which Seiko discontinued it. It comprised only a handful of different references, and it was produced \u003cstrong\u003eexclusively for the Japanese domestic market\u003c\/strong\u003e—not a single model was exported through regular channels.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe result is clear: While the Suwa 6139 and 6138 chronographs are known worldwide and exist in large numbers, even many Seiko collectors are unaware of the 7017s. They are simply scarce.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eThe caliber 7017\u003c\/h3\u003e\n\u003cul dir=\"ltr\"\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eAutomatic chronograph\u003c\/strong\u003e with \u003cstrong\u003eflyback function\u003c\/strong\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e\u003cstrong\u003e21,600 semi-oscillations per hour\u003c\/strong\u003e\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCentral chronograph hand\u003c\/strong\u003e in orange, measuring range 60 seconds\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eInternal rotating bezel\u003c\/strong\u003e for measuring longer time periods\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eDay and date\u003c\/strong\u003e with quick-set, day disk bilingual (Japanese\/English)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003e5.9 mm movement height\u003c\/strong\u003e – a world record at market launch\u003c\/li\u003e\n\n\u003cli\u003eManufactured by \u003cstrong\u003eDaini Seikosha\u003c\/strong\u003e, Tokyo\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp dir=\"ltr\"\u003eOn operation: The top pusher starts and stops the chronograph, the bottom one resets it. The flyback function means that the bottom pusher can also be operated while the chronograph is running—the hand jumps to zero and immediately starts again.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eMany collectors let the chronograph on these movements run permanently. With the 7017 design, this is perfectly safe and distributes wear more evenly.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eDial and case\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eThe matte black dial is divided into two zones: the inner part features the time display with applied, luminous baton indices, while the outer part has the rotating ring with fine graduations and white numbering in five-minute increments.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe \u003cstrong\u003eSpeed-Timer\u003c\/strong\u003e lettering is in orange directly under the SEIKO logo, and below that is the Seiko 5 badge. At the bottom of the dial, \u003cem\u003eSPORTS \/ WATER 70m PROOF\u003c\/em\u003e appears with the Daini lightning bolt.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe central chronograph hand is also orange, making it the only color accent on the black background—a design element that Seiko used consistently for its sports chronographs during those years.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe calendar window at three o'clock is framed by a light-colored border and displays the day of the week and the date. The day disk is bilingual and can be toggled between Kanji and English abbreviation; the photo shows Tuesday 火.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe stainless steel case is designed as a softly rounded cushion, with polished flanks, a brushed top, and a narrow, beveled bezel that frames the dial. The two pushers are located at two and four o'clock, with the crown in between at three o'clock.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eIt is a robust case—this is the price for an automatic chronograph, and it corresponds exactly to the design language for which Japanese sports watches from the early 1970s are sought after today.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eCondition\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eTechnically flawless. The watch was professionally serviced in Japan in the spring\/summer of 2026—fully disassembled, cleaned, oiled, and regulated. The automatic winding, chronograph, flyback function, internal bezel, and quick-set day and date all work perfectly.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe dial is well-preserved: the matte black surface is uniform, the lettering—including the orange Speed-Timer inscription—is complete and sharp, the applied indices are firmly in place, the rotating ring has undamaged numbering, and the calendar frame is intact.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe luminous material in the indices and hands has aged to a warm beige and no longer glows. This is the norm for watches of this era.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThe stainless steel case shows clear, age-appropriate signs of wear on the bezel, edges, and flanks—this watch has been worn. The basic shape is preserved; the watch does not appear over-polished. The pushers are complete and functional. The case back shows scratches from opening and wearing; all engravings—reference 7017-6010, serial number, Daini lightning bolt—are complete and clearly legible. The crystal shows light signs of use.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eA third-party stainless steel bracelet is mounted; it is not the original Seiko bracelet.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul dir=\"ltr\"\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eBrand \/ Line:\u003c\/strong\u003e Seiko 5 Sports, Speed-Timer\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eReference:\u003c\/strong\u003e 7017-6010\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eSerial number:\u003c\/strong\u003e 125647\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eProduction date:\u003c\/strong\u003e February 1971\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eMovement:\u003c\/strong\u003e Seiko caliber 7017, automatic chronograph with flyback, 21,600 A\/h, movement height 5.9 mm\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Daini Seikosha, Japan\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eFunctions:\u003c\/strong\u003e Hours, minutes, chronograph (60 seconds, central hand) with flyback reset, internal rotating bezel, day and date with quick-set, bilingual day disk (Japanese\/English)\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCase:\u003c\/strong\u003e Stainless steel, cushion shape, two pushers, case back with \"WATERPROOF\" marking\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eDiameter (without crown):\u003c\/strong\u003e 43 mm\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 13.6 mm\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eLug-to-lug:\u003c\/strong\u003e 45.7 mm\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eLug width:\u003c\/strong\u003e 19 mm\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eWeight (incl. bracelet):\u003c\/strong\u003e 110 g\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eBracelet:\u003c\/strong\u003e Third-party stainless steel bracelet\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eCrystal:\u003c\/strong\u003e Mineral glass\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cstrong\u003eService:\u003c\/strong\u003e Spring\/summer 2026, Japan – full disassembly, cleaning, oiling, regulation\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3 dir=\"ltr\"\u003eFor whom\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eFor collectors who take Japanese chronographs seriously. Everyone knows the 6139. Very few know the 7017 from the competing Daini factory—yet it is flatter, technically more sophisticated, and was built in far smaller numbers.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eFor those who want a flyback chronograph. This complication is otherwise found in price brackets that have nothing to do with this watch.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eFor fans of thoughtful engineering. Three hands, a rotating ring, a flyback reset—together they make a fully functional measuring instrument on a dial that appears calmer than any conventional chronograph.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eAnd for lovers of Japanese sports watches from the early 1970s: cushion case, matte black dial, orange chronograph hand, bilingual Kanji day disk. This combination was only available in Japan and only for two years.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eWarranty (used)\u003c\/strong\u003e\u003cbr\u003eThis is a used item. The limitation period for claims for defects (statutory warranty) is 12 months from delivery.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cstrong\u003eNote\u003c\/strong\u003e\u003cbr\u003eAs this is a vintage 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":54783482397010,"sku":"A494","price":799.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0911\/3908\/0530\/files\/8B013D50-56E8-4960-A57D-FBDDA2A3C1D6.jpg?v=1789913733","url":"https:\/\/japanese-microbrands.com\/en\/products\/seiko-5-sports-jdm-speed-timer-7017-6010-kaliber-7017-flyback-chronograph-mit-innenlunette-daini-seikosha-februar-1971-frisch-revidiert","provider":"Japanese Microbrands - Mario Lenke","version":"1.0","type":"link"}