Vintage 1973 JAPAN KING SEIKO WEEKDATER 5626-7111 25Jewels Automatic.

Vintage 1973 JAPAN KING SEIKO WEEKDATER 5626-7111 25Jewels Automatic.

Welcome to my auction!

Item description

Movement :

• Pet name : 56 KING SEIKO WEEKDATER .
• Caliber number : 5626A,B.
• Movement : Automatic.
• Beat rate : 28800bph.
• Year of manufacture start : 1968's.
• Factory : Suwa.

Externals :

• Serial No. : 341933.
• Dial No. : JAPAN 5626-7110R.
• Glass : Crystal.
• Case size : About 36.4mm.
• Lug width : 18mm.
• Band : New Leather Strap of SEIKO original.

Condition :

• Used, it runs well.
• Quick set(Day/Date) : Okay.
  Set the day of the week can be in English or Japanese.
  Set of the date : The set at one stage pulling the crown.
• The day difference time of an used watch is about +-1 minute / day.
• For practical, everyday use, it would be advisable to have the movement cleaned and oiled.

Key Features

• The Sovereign Peak of 1970s King Chronometer-Grade Luxury (1973): Manufactured in 1973—a landmark historical era during Japan's peak post-war industrial supremacy and the golden age of mechanical competition—the King Weekdater reference 5626-7111 stood as Suwa Seikosha's quintessential high-grade executive flagship. Positioned at the pinnacle of Seiko's internal luxury hierarchy directly alongside Grand Seiko, this reference was engineered to deliver chronometer-grade chronometric precision paired with mature, disciplined Showa corporate styling.
• The Celebrated High-Beat 25-Jewel Caliber 5626 Automatic Heart: Powering this iconic instrument is the revered in-house 25-jewel Caliber 5626 (5626B), an automatic high-beat engine operating at 28,800 vibrations per hour (8 beats per second). Highly respected by vintage horologists for its ultra-slim profile and exceptional daily rate stability, the caliber features an auxiliary external regulation screw mechanism accessed between the lower lugs, quick-set dual-calendar manipulation, hacking seconds, manual-winding capability, and a lavish 25-jewel specification to minimize friction across its high-frequency train.
• Architectural ""7111"" Grammar of Design Zaratsu Case Geometry: The reference 5626-7111 represents one of the purest expressions of Taro Tanaka's ""Grammar of Design"" principles applied to modern executive wristwear. Executed in a solid stainless steel screw-back case, it features razor-sharp angular facets, broad planar lugs, flat bezel surfaces, and distortion-free mirror-polished Zaratsu chamfers that transition sharply into brushed surfaces, giving the watch brilliant light reflection while resting flat against the wrist.
• Masterful ""Weekdater"" Dial Harmony and Bilingual Utility: The dial of the 5626-7111 showcases clinical 1970s layout balance, featuring a radiant silver sunburst canvas framed by a discrete outer track. It is accented by hand-applied, multifaceted rectangular block indices with black contrast inserts, razor-sharp baton hands, and a framed dual-calendar aperture at 3 o'clock housing a bilingual (English/Kanji) day disk and date wheel, proudly signed with the applied ""KS"" emblem, bold ""HI-BEAT"" typography, and the Suwa Seikosha vortex insignia above 6 o'clock.
• An Investment-Grade Masterpiece of Suwa's High-Beat Lineage: Produced during the mature mechanical production era in 1973, the 5626-7111 25-jewel King Weekdater remains an indispensable, highly coveted cornerstone reference for serious vintage collectors worldwide. Capturing the precise historical zenith where Suwa Seikosha perfected high-frequency automatic calibers within crisp, sculptural case architecture, it stands as an enduring heirloom of Japanese horological supremacy.

For more information, please look at the pictures.

Notes

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