This serviced Rare Vintage 1966 Seikomatic Green Dial Diashock 35 Jewels Ref. 6218-8470 is a spectacular example of mid-1960s Japanese horology, embodying the executive design language and mechanical sophistication of Seiko's premier automatic dress watches from the era. It is driven by the prestigious 35-jewel Caliber 6218 automatic movement, a top-tier flagship workhorse engineered with Diashock shock protection, a hacking mechanism, and fine regulation to deliver the supreme chronometric precision and mechanical longevity that defined the Seikomatic legacy. Following a full mechanical service, the caliber operates with optimal efficiency, providing seamless automatic performance, quickset date operation, and crisp timekeeping that established the line's prestige.
The face of the watch features a stunning, professionally refinished emerald green sunburst dial with a radiant gradient finish that shifts gracefully from a vibrant emerald center to deep forest tones towards the perimeter. A crisp framed day-date window sits at 3 o'clock, highlighting the textbook 1960s symmetry of the layout. The dial is beautifully appointed with an applied silver SEIKO logo, crisp Seikomatic Diashock 35 Jewels typography, applied faceted baton indices with a prominent textured double marker at 12 o'clock, and matching razor-sharp dauphine hands, adding incredible depth, legibility, and captivating visual flair to the rich green background.
The stainless steel case is beautifully preserved, retaining its sharp factory geometry, polished bezel, and smooth lug contours that sit comfortably on the wrist. Highlighting its signature Seikomatic architecture, this reference incorporates a sleek recessed crown at 4 o'clock, perfectly complementing the balanced proportions of the case. Outside of the professionally restored green dial, the watch head remains entirely authentic and unaltered, retaining its original factory movement, hands, case, crystal, and crown to meet the high standards of discerning enthusiasts, beautifully paired with a premium textured black leather strap.
Collectors fiercely pursue the 35-jewel Seikomatic 6218 series for its flagship luxury status, top-grade movement architecture that directly laid the groundwork for the first automatic Grand Seiko, and classic mid-century proportions. While purists value strict factory originality, this expertly refinished specimen combines pinnacle 1960s automatic engineering with a bold, distinctive color palette, a refined and essential cornerstone ready for any serious vintage Seiko collection.
