Vintage Seiko 21 Jewels Automatic with Charcoal Sunburst Dial – from September 1970

SEIKO vintage mechanical watch
MADE IN JAPAN

“Seiko” (精工) is a Japanese word meaning “precision,” “exquisite workmanship,” or “refined craftsmanship.”
It comes from the characters:

• 精 (sei) – fine, precise, refined

• 工 (ko) – craft, workmanship

Originally, Seiko’s watchmaking division was called Seikosha (精工舎), meaning “House of Precision.”
In 1924 the company shortened the name to Seiko, keeping the core meaning.

So the brand name literally ties directly to the idea of precision engineering—which is exactly what the company wanted to be known for in its watches.

🕰️The Seiko 7006 Caliber Heritage

The 7006 series represents a transitional sweet spot in Seiko’s rich design history, emerging from the legendary Daini factory at the dawn of the 1970s. Positioned as a reliable, daily-wear dress watch with a sporty edge, the 7006-8000 case design bridges mid-century classicism and the bolder, more geometric aesthetics of the decade. Unlike the ubiquitous 17-jewel variants commonly exported globally, this specific 21-jewel edition features a more refined, higher-jeweled movement architecture intended to reduce friction and prolong mechanical longevity.

Technical Specifications

• Brand: Seiko
• Model Reference: 7006-8000
• Movement: Seiko Caliber 7006A automatic, 21 jewels, non-hacking, non-handwinding
• Production Date: September 1970 (Serial number: 092899)
• Dial: Charcoal dark grey/brown sunburst with applied stick indices and Daini Seikosha lightning bolt logo
• Complications: Day and date display window at 3 o’clock position
• Case Material: Stainless steel
• Caseback: Screw-down stainless steel with “WATERPROOF” text configuration
• Bracelet: Multi-link stainless steel bracelet with a signed Seiko folding clasp

Watch went through a complete service by a professional watch tech and keeps good time.

Comes complete with original steel bracelet*.

(*)Note: Stock bracelets are often shortened by previous owners and may not fit you(see bracelet size in the product images). We recommend adding a new Seiko lug width matched leather strap with your order.

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We guarantee that the item in this ad looks and works as advertised and offer money back guarantee on this.

Seiko Group Corporation (セイコーグループ株式会社, Seikō Gurūpu kabushiki gaisha), commonly known as Seiko, is a Japanese maker of watches, clocks, electronic devices, and semiconductors. Founded in 1881 by Kintarō Hattori in Tokyo, Seiko introduced the world’s first commercial quartz wristwatch in 1969.

Seiko is widely known for its wristwatches. Seiko and Rolex are the only two watch companies considered to be vertically integrated. Seiko is able to design and develop all the components of a watch, as well as assemble, adjust, inspect and ship them in-house. Seiko’s mechanical watches consist of approximately 200 parts, and the company has the technology and production facilities to design and manufacture all of these parts internally.

Seiko offers one of the widest ranges of watch technologies in the world—quartz, kinetic, solar, mechanical, and Spring Drive—spanning everything from affordable everyday pieces to six-figure haute horlogerie. Over the decades it has launched multiple global brands, including Lorus, Pulsar, and Alba, while elevating its prestige through innovations like Spring Drive, which helped push Seiko into higher-end territory. In the 2010s, Grand Seiko and Credor were separated into fully independent luxury brands, while Seiko’s own global lineup now includes Grand Seiko, King Seiko, Prospex, Astron, Presage, and Seiko 5 Sports, with Credor remaining primarily Japan-focused.

Among Seiko’s key lines, Seiko 5 (born in 1963) is the gateway mechanical series known for durability and value; Lord Matic defined 1970s style with faceted crystals and colorful dials; Astron remains Seiko’s flagship GPS-solar tech line; Presage focuses on traditional mechanical craftsmanship with enamel and urushi dials; and Prospex delivers professional-grade dive, field, and pilot watches often embraced by enthusiasts. At the top end, Grand Seiko emphasizes precision, Zaratsu polished design, and movements like Spring Drive, while King Seiko—revived in the 2020s—brings back sharp, elegant 1960s styling with modern calibres.

Finally, Credor represents Seiko’s pinnacle of artisanal watchmaking, producing low-volume pieces in precious metals and showcasing Japanese decorative arts and haute complications from the Micro Artist Studio. Beyond watches, Seiko has also produced various electronic devices and, historically, jewelry and eyewear—though those divisions have since shifted to other companies.