This serviced 1976 Seiko Actus SS Ref. 6306-5000 represents mid-1970s Japanese horology, embodying the bold geometric styling and mechanical innovation of Seiko's distinguished domestic Actus lineup. It is powered by the esteemed 21-jewel Caliber 6306 automatic movement from Suwa Seikosha, featuring Diashock shock protection, a hacking "Second Setting" mechanism, and an intuitive quickset day/date system. Following a full mechanical service, it operates with supreme precision, optimal efficiency, and dependable performance.
The hallmark of this timepiece is its factory-original silver dial, capturing light with sharp precision across its subtle vertically textured surface. The layout is appointed with an applied silver SEIKO logo, crisp "Actus" and "SS 21 JEWELS" typography accompanied by the Suwa factory insignia, faceted baton hour markers with sleek black contrast inlays and a prominent double index at 12 o'clock, razor-sharp hands, and a framed bilingual English/Kanji day-date window at 3 o'clock.
The 34mm stainless steel rectangular tank case preserves its sharp factory geometry, brushed upper planar surfaces, and polished bevels that sit comfortably and architecturally on the wrist. Departing from conventional round silhouettes, it positions its winding crown neatly at 3 o'clock. The timepiece remains 100% factory-correct and complete, retaining its original dial, hands, crystal, case, crown, and rare factory-original stainless steel multi-link bracelet.
An exceptionally desirable 1976 Seiko Actus SS reference combining robust 21-jewel hacking 6306 engineering, avant-garde modernist rectangular case architecture, an untouched vertically textured silver dial, and full original bracelet integrity.
