SEIKO BULLHEAD 6138-0040, AUTOMATIC, YEAR 1976

Brand

Seiko

Model

6138-0040 Bullhead

Gender

Man‎

Decade

1970s

Year of manufacture

1976

Serial number

6D9402

Case code

0040

Movement

Automatic‎ ‎

Caliber

Seiko 6138

Crystal

Hardlex Seiko

Bezel

Aluminum, with tachymeter.‎ ‎

Case material

Steel‎ ‎

Diameter without crown

43 mm

Diameter with crown

44 mm

Lug-to-lug length

47 mm

Thickness

14 mm

Strap width

20 mm

Strap material

Steel‎

Strap color

Steel‎ ‎

Closure/buckle

Drop-down clasp, signed SEIKO‎ ‎

Condition of the watch

Very good, with slight signs of aging.‎

Case/Box

Yes, generic.‎ ‎

Documentation

Free Certificate of Authenticity available on request‎

Seiko’s history began in 1881 in Tokyo, Japan, when a young entrepreneur named Kintaro Hattori opened a watch repair and sales shop. His vision was to create high-quality watches, and in 1892 he founded the Seikosha factory (in Japanese, “Seiko” means “precision” or “success”, and “sha” means “house”). Initially, Seikosha produced wall clocks, but over time they focused on pocket and wristwatches production.

First Japanese wristwatch

In 1913, Seikosha launched the Laurel, the first wristwatch made in Japan. This marked a significant milestone, as Japan had no watchmaking tradition at that time. The company became a pioneer in its country and laid the foundation for what would become a benchmark name in the global watch industry.

Technological innovation and quartz watches

In 1969, Seiko revolutionized the watchmaking world with the Seiko Astron, the world’s first quartz wristwatch. This breakthrough transformed the watch industry by introducing a much more accurate and affordable technology than traditional mechanical movements. Quartz technology quickly became popular and remains a standard in modern watchmaking.

Precision and reliability

Over time, Seiko has introduced multiple watchmaking innovations, such as the automatic chronograph and the Kinetic charging system (a combination of kinetic energy and quartz technology). It is also known for its dive watches, highly valued for their durability and resistance in extreme conditions.

Seiko has earned a special place in the watch industry by combining tradition and technology at affordable prices, offering from simple models to high-end pieces with its Grand Seiko line.

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Additional information

Fully serviced watch. Guaranteed for daily use.

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Model

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Gender

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Country of origin

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Decade

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Year of manufacture

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Serial number

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Case code

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Movement

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Case/Box

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Documentation

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Country of origin

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Diameter with crown

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For your complete peace of mind, all our WATCHES ARE PROTECTED WITH A 1-YEAR WARRANTY.
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