Vintage Seiko Titanium Day-Date Quartz (Ref. 7N43-0AN0) – Ultra-Lightweight Everyday Classic

Seiko vintage quartz watch
Japanese movement — cased in China

“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.

This Seiko 7N43-0AN0 has a titanium case on its original titanium bracelet: the case back is engraved TITANIUM and WATER RESISTANT 10 BAR, and the clasp blade is stamped TITANIUM-D. Titanium is roughly 40% lighter than stainless steel, which is what gives the watch its feel on the wrist.

The black dial is plain by design — applied silver baton markers, a printed minute track, TITANIUM at 6 o’clock and a day-date window at 3. Inside is Seiko’s 7N43, the entry-level workhorse quartz of its day: one jewel, rated to about ±20 seconds a month, powered by a single SR920SW cell. The case-back serial 800071 dates the watch to October of a year ending in 8, so 1998 or 2008; the caliber itself was produced from 1993 to 2009.

Technical Details

• Reference Number: 7N43-0AN0

• Movement Type: Seiko 7N43 Quartz (1 Jewel)

• Battery Specification: SR920SW (Maxell Japan installed)

• Case Material: Solid Titanium

• Band Material: Titanium Three-Link Bracelet

• Dial Color: Matte Black with Applied Silver Baton Markers

• Calendar: Day & Date Display at 3 o’clock

• Water Resistance: 10 Bar (100 Meters / 330 Feet)

• Lug Width: 20mm

• Manufacturing Origin: Movement Japan, cased in China (as engraved on the case back)

This watch has recently been serviced by a professional watchmaker and keeps good time.

Comes complete with original titanium 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.

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We guarantee the item you receive looks and works exactly as advertised — or your money back.

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.