Description
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.”
The name first appeared on a watch dial in 1924, shortened from Seikosha and keeping the core meaning; the company itself was renamed Hattori Seiko in 1983 and Seiko Corporation in 1990.
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.
About the SilverWave Line
The Seiko SilverWave was Seiko’s line of water-resistant sports watches, first introduced in the early 1960s and still in the catalogue through the 1970s and into the 1980s. The name captured the whole idea in two words — a bright, polished steel case (“Silver”) engineered to keep water out (“Wave”). It was the Seiko you never had to take off: at the poolside, caught in the rain, or simply worn day in and day out.
Where the Sportsmatic and later Seiko 5 lines chased the affordable everyday automatic, the SilverWave staked out the water-resistant corner of the catalogue. Its cases were fully sealed with screw-type case-backs and gaskets, stamped “WATER RESIST” on the reverse, and the sportier references in the family were built as genuine divers. It was the accessible, water-ready Seiko for the buyer who wanted a single watch for work, weekend and water alike.
At the very end of the 1970s the SilverWave made the leap to quartz. Just a decade after Seiko introduced the world’s first quartz wristwatch, the name returned on a new generation of water-resistant quartz models — among them the caliber 7121 references like this one: a hacking quartz movement accurate to ±15 seconds a month, housed in the same sealed, wave-stamped steel cases the line was known for. These launch-generation quartz SilverWaves of 1978–1980 capture Seiko at the precise moment its quartz revolution was reshaping the whole industry.
About This Watch
This is a launch-generation quartz SilverWave, reference 7121-701A, produced in October 1979 (serial 902648). The deep blue dial is the star of the piece — a smooth, even field that darkens toward the rim, set with applied polished baton markers and a fine minute track. An applied metal emblem sits above centre, with the SilverWave name beneath it in period cursive script and the Daini Seikosha lightning bolt below that.
Inside beats Seiko’s caliber 7121A — a clean, no-date quartz movement with hacking seconds and a rated accuracy of ±15 seconds a month, figures a mechanical watch of the day could only dream of. The brushed stainless-steel case carries the line’s signature sealed construction, with the wave emblem stamped into the water-resistant case-back, and the watch sits on a vintage steel bracelet with fold-over clasp.
Technical Specifications
- Brand: Seiko
- Line: SilverWave (quartz)
- Reference Number: 7121-701A
- Movement: Seiko caliber 7121A, quartz, 2 jewels, hacking seconds, rated ±15 seconds/month, made by Daini Seikosha
- Serial Number: 902648
- Production Date: October 1979
- Case Material: Stainless steel
- Case Diameter: Approx. 35 mm (excluding crown)
- Dial: Deep blue, darkening toward the rim; applied baton markers, applied metal emblem, SilverWave script and Daini Seikosha lightning bolt
- Crystal: Mineral glass
- Case-back: Stainless steel with embossed wave emblem, marked “WATER RESISTANT STAINLESS STEEL JAPAN-L”
- Country of Manufacture: Japan
Condition Report
The deep blue dial is in excellent condition — clean and even, with crisp printing, sharp applied markers and unblemished hands. The stainless-steel case shows light scratches and scuffs from normal wear, most visible on the polished surfaces, with no dents or deep damage. The vintage steel bracelet shows honest surface wear, including scratching on the clasp, and closes securely. A fresh battery was installed during service.
This watch has recently been serviced by a professional watchmaker and keeps good time.
Comes complete with vintage steel bracelet*.
(*)Note: Stock bracelets are often shortened by previous owners and may not fit you(see bracelet size in the product images). We match the strap to this watch’s lug width, so there is nothing for you to measure — just pick a padded leather strap for Seiko from the options at the top of the page.
This watch ships from 🇺🇦 Ukraine with tracking number
Why Collectors Want This Watch Today
The quartz SilverWaves of 1978–1980 sit at an interesting crossroads: they carry the name and water-resistant build of one of Seiko’s classic sports lines, made in the exact years quartz was taking over the watch industry. White and black dials dominate the 7121 sold record; blue examples like this one turn up less often. Seiko built the quartz SilverWave in volume, so what separates one example from the next is condition rather than scarcity. It is an accessible, wearable piece of the quartz revolution — accurate enough for daily duty nearly five decades on.
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We guarantee the item you receive looks and works exactly as advertised — or your money back.
Seiko lug-width matched leather straps — 18 / 19 / 20 mm
About the watch factory
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 is one of the few watch companies that is fully 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 2017, Grand Seiko was spun off into its own standalone luxury brand, while Credor remains part of Seiko’s own lineup, sold primarily in Japan. Seiko’s own global lineup now includes Grand Seiko, King Seiko, Prospex, Astron, Presage, and Seiko 5 Sports.
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.
