Vintage 1972 JAPAN KING SEIKO CHRONOMETER 5625-7170 25Jewels Automatic.

Vintage 1972 JAPAN KING SEIKO CHRONOMETER 5625-7170 25Jewels Automatic.

Welcome to my auction!
I am Japanese who live in Tokyo.

Item description

Movement :

• Pet name : 56 KING SEIKO (CALENDAR) .
• Caliber number : 5625A,B.
• Movement : Automatic.
• Beat rate : 28800bph.
• Year of manufacture start : 1968's.
• Factory : Suwa.

Externals :

• Serial number : 291982.
• Dial number : JAPAN 5625-7180R.
• Glass : Crystal.
• Case size : About 35.5mm.
• Lug width : 17mm.
• Band : Wrist size that can be worn is Up to about 183mm.

Condition :

• Used, it runs well.
• Quick set(Day/Date) : Okay.
  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.
• There is a faint scratch near the center of the glass.

Key Features

The Sovereign Peak of 1972 Suwa Chronometry (1972): Manufactured in **1972**—a milestone historical year during Suwa Seikosha's golden era of mechanical chronometer production—the **King Seiko Chronometer (56KS)** reference **5625-7170** represented the pinnacle of high-precision, date-only executive watchmaking. Officially certified to strict internal chronometer standards, this model was engineered to challenge elite Swiss luxury timepieces in both accuracy and finishing.

The Legendary High-Beat 25-Jewel Caliber 5625 Heart: Powering this historic instrument is the high-grade **25-jewel Caliber 5625A**, an in-house automatic engine operating at a swift high-beat frequency of **28,800 vibrations per hour (8 beats per second)**. Regulated at the factory to chronometer-grade tolerances, this **25-jewel movement** features **hacking seconds**, smooth manual-winding capability, and a quick-set date mechanism.

Architectural ""7170"" Grammar of Design Case Geometry: Sourced in a solid stainless steel case, the reference **5625-7170** is globally distinguished for its bold, sharp-faceted case architecture. Built strictly in accordance with Taro Tanaka's **""Grammar of Design""** philosophy, the case features razor-sharp Zaratsu-polished facets, sweeping broad lugs, and clean geometric lines engineered to reflect light without visual distortion.

Immaculate Date-Only Dial Symmetry and Clinical Clarity: The dial of the **5625-7170** exhibits clinical mid-century visual balance, displaying a radiant silver sunburst canvas decorated with **hand-applied, multifaceted rectangular block indices** with black center inserts. Free from day-window clutter, the neatly framed date aperture at 3 o'clock is perfectly balanced by the applied **""KS"" logo**, **""HI-BEAT""** text, and official **""CHRONOMETER""** designation above 6 o'clock.

The Sovereign Solid Gold KS Chronometer Back Medallion: The ultimate seal of prestige rests on the case back: the iconic **solid gold-embossed King Seiko Chronometer medallion** set flush into the backplate. Certifying its elite factory-regulated accuracy standard and historical status within Suwa Seikosha's legacy, the 5625-7170 King Seiko Chronometer stands as an essential, investment-grade cornerstone reference for serious vintage watch collectors worldwide.

For more information, please look at the pictures.

Notes

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