Description
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.”
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.
🕰️ The Seiko Seikomatic line was a flagship series of high-quality automatic watches produced primarily throughout the 1960s. It represented Seiko’s transition into the modern era of self-winding timepieces, and sat at the top of the company’s mainstream automatic ranges.
The Seikomatic Line: The “Business Class” Ancestor
Seikomatic was designed for the “modern business professional” of the 1960s. Its most recognisable design choice was the crown dropped to the 4 o’clock position — a placement Seiko used widely across its 1960s automatics, which kept the crown clear of the wrist on watches that were set by hand but never wound by hand.
The Name: It’s a portmanteau of “Seiko” and “Automatic.” At the time, automatic winding was a high-tech feature, so Seiko branded these watches to highlight that they didn’t need manual winding.
The Design Philosophy: Seikomatics were designed for the “New Lifestyle” of the 1960s—aimed at office workers and professionals. They were styled for that market: a clean case flank, applied markers, and the crown set low at 4 o’clock rather than at 3.
The “Weekdater”: The best-known Seikomatic is the “Weekdater,” which added a full day-of-the-week window to the date. On this reference the date sits at 3 o’clock and the day window at 6.
This particular example carries case-back reference 6206-8080 and serial number 5733421, which dates it to July 1965, inside the calibre’s May 1964 – February 1967 production run. The dial is original, signed Seikomatic with the Diashock 26 Jewels designation, and the day-date wheels remain crisp and legible under the fluted, two-tone gold-plated bezel. The recessed crown sits at 4 o’clock and functions correctly.
Technical Specifications
Brand: Seiko
Line: Seikomatic (“Weekdater”)
Reference Number: 6206-8080
Movement: Automatic, Caliber 6206, 26 jewels, Diashock shock protection
Serial Number: 5733421
Production Date: July 1965
Case Material: Stainless steel with gold-plated fluted bezel
Dial: Silver, day-date (“Weekdater”) with applied baton markers
Caseback Features: Screw-down steel caseback, dolphin/Seiko water-resistance mark
Country of Manufacture: Japan
Condition Report
This watch has recently been serviced by a professional watchmaker and keeps good time. The dial, hands, and day-date wheels show no significant fading or damage, and the fluted bezel keeps its sharp flute definition, though the gold plating has worn and darkened around the outer rim — see the close-up images. As with any pre-owned vintage piece, service history prior to our workshop’s service is unknown. The watch comes fitted with a leather strap—please see the product images for an accurate sense of fit and condition.
Stock straps on vintage Seiko watches are often shortened or replaced by previous owners over the decades, so fit can vary. If you’d like a fresh strap sized correctly for this watch’s lug width, we offer matched leather options below.
This watch ships from 🇺🇦 Ukraine with tracking number.
Why Collectors and Enthusiasts Want This Watch Today
The Seikomatic Weekdater put a day-date automatic on the wrists of the Japanese salarymen and professionals Seiko was selling to in the mid-1960s. The crown dropped to 4 o’clock is a design cue Seiko used across its 1960s automatics, and it keeps the case flank clean on the wrist. A fully serviced, running example with its original dial and an intact fluted bezel — as this one is — is a wearable piece of Seiko’s 1960s design history.
Payment & Guarantee
We accept PayPal and all major credit cards (Visa, MasterCard, American Express, Discover). Every watch we sell is backed by our money-back guarantee—if it doesn’t arrive as described, we’ll make it right.
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 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.
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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.
