SEIKO vintage quartz 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.

🕰️ Seiko SilverWave — Overview

Seiko Silverwave refers to a vintage line of Seiko wristwatches, originally marketed as robust, water-resistant sports watches and early “desk divers.” They aren’t typically full professional dive watches (most are only water-resistant, not suit-rated for deep diving), but they feature design elements like screw-down crowns and case backs aimed at splash and swim resistance — a hallmark of the Silverwave range from the 1960s into the early 1980s.

This line was popular in Japan (often as Japanese Domestic Market / JDM models) and includes both quartz and mechanical automatic versions across different decades. It’s an important name in Seiko’s dive/sport-watch story and a favourite among vintage collectors.

DESCRIPTION

Step back into the golden era of Japanese horology with this rare, Japan-Domestic-Market (JDM) Seiko SilverWave Ref. 7121-7020. Manufactured in November 1979, this watch perfectly balances rugged sports engineering with an edgy, integrated-case aesthetic that screams late-70s retro-futurism.

What makes this model an absolute standout is its deep matte black dial contrasted by a distinct inner chapter ring featuring 13-to-24 military hour markers. Combined with its screw-down crown and legendary twin-wave caseback insignia, this watch was designed for the active lifestyle of the era while maintaining an incredibly sharp, low-profile wrist presence. Powered by the reliable, jewel-bearing Seiko 7121 quartz movement, it isn’t just a timekeeper—it’s a robust piece of wearable history.

Technical Details

• Model: Seiko SilverWave

• Reference Number: 7121-7020

• Serial Number: 9N2112 (November 1979)

• Movement: Seiko Caliber 7121A Quartz (2 Jewels, Made in Japan)

• Battery Type: SR1130 (Panasonic)

• Case Material: Brushed and Polished Stainless Steel

• Dial: Matte Black with luminous hands, stick indices, and a 24-hour military inner track

• Caseback: Screw-down with official Seiko “Twin Wave” sea logo

• Bracelet: Original stainless steel bracelet with GA940 end links

• Country of Manufacture: Japan (JDM Release)

Watch went through a 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.