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Seiko 6218-8971 Weekdater / Seikomatic Diashock

This Seiko Weekdater dates to October of 1965. The watch has a narrow bezel which accentuates the dial, a graduated chapter ring, beautiful fonts, split date and day windows and dauphine-style hands. These aren’t the easiest watches to source and this lovely unpolished example is completely original aside from a classic two-piece brown leather strap.

Original 37mm x 44mm stainless steel case with original caseback. The etched case back markings (a crown & a dolphin) are still clearly visible; these are often completely worn. With a narrow fixed bezel, the case has a comfortably thin profile with well sculpted angular 19mm lugs.

Original unsigned stainless-steel crown, recessed at 4 o’clock.

Original Seiko 35 jewel 6218A automatic movement beats at 18,000 bph. The hacking movement is keeping near perfect time on a winder.

Original silver Seikomatic Weekdater applique dial, silver satin with a starburst-style grain topped with a glossy lacquer finish. It’s set with polished applied markers with great beveled detailing, and framed with a raised minute chapter ring.

Original dauphine-style minute & hour hands and straight seconds hand. The hour and minute hands are broad and beveled dauphines that taper to a fine point and sport a mirror finish.

Original acrylic crystal.

The framed date window is at three, and a framed full day window sits above the six (the Saturday display is blue & the Sunday display is red). The quickest date function (changed by pushing in the crown while in the ‘a’ position) does not function as it should - the date will not advance by quickset.

Two-piece 19mm brown leather strap, with brown accent stitching and stainless steel buckle.

Please see the photos for greater detail of this vintage beauty’s overall condition.

$349.00 shipped (conUS only) - paypal (fees on me).

“At the time of its introduction in 1964 the 6218-8971 Seikomatic Weekdater was the top of the range flagship of the Seiko automatic lineup. The 1964 Weekdater was the immediate, automatic equivalent of the 1964 Grand Seiko hand-wind, before the appearance of the first automatic GS in 1967. The 6218 movement’s an automatic, 35 jewel, 18,000bph, hacking calibre based on the 62xx platform that powered everything from Seikos World Time and their first dive watch, through to the Grand Seikos of the era. Both the 57GS/43999, 6218 and 62GS have 35 or 39 jewel movements and are all examples where jewels were added to stop what has been translated from the Japanese as the ‘shake fall problem’ with the datewheel. Seikos of this era are renowned for the variety of designs that were featured on their caseback, anything from sealions, seahorses, dolphins, olympic flames and even crowns.”
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