Seiko “Radio Wave Control” Solar JDM Exclusive – Epson 25-Year Service Award with black dial

Seiko quartz wristwatch
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 calledSeikosha (精工舎), meaning“House of Precision.”
In 1924 the company shortened the name toSeiko, keeping the core meaning.

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

🕰️Seiko Spirit — Overview

The Seiko Spirit: A JDM Heritage

TheSeiko Spiritline (later transitioning into theSeiko Selectioncatalog) represents one of Seiko’s most beloved Japanese Domestic Market (JDM) collections.Positioned as a versatile everyday line, the Spirit collection bridges the gap between affordable entry-level models and high-end luxury pieces like Grand Seiko.It is highly regarded by enthusiasts for offering clean, classic “three-hand” dress aesthetics infused with advanced daily-wear technology—ranging from high-accuracy automatic movements to cutting-edge solar radio-controlled calibers.Because these models were primarily intended for sale within Japan, they feature premium execution, tighter quality control, and an air of exclusivity that makes them highly collectible abroad.

A Seiko Epson Long-Service Award Watch

ThisSeiko Radio Wave Control Solarwas never sold in a shop. Its case back is engraved勤続25年表彰記念— “commemorating 25 years of continuous service” — above the date2008年12月(December 2008) and theEPSONname. It was presented to an employee of Seiko Epson, the arm of the Seiko group that actually builds these movements, to mark a quarter-century with the company.

The Ultimate Set-and-Forget Companion

Never change a battery, and never set the time. Seiko’scaliber 7B22runs on light alone, charging from any ambient source, while itsRadio Wave Controlfunction listens for the official atomic time signal and corrects itself automatically. Between reception windows the movement is rated to ±15 seconds a year, and a full charge carries roughly six months of running — up to eighteen in power-save mode. The full auto calendar handles short months on its own.

Quiet, Wearable Formality

The dial is black with a finely textured centre disc, polished applied indices and a date window at 3 o’clock, ringed by the discreet city and time-zone markings that distinguish these radio-controlled models. The stainless steel case is slim and softly faceted — the kind of watch that disappears under a cuff and still looks right with the jacket off. It comes on a black leather strap with contrast stitching.

Technical Specifications

• Model:Seiko Radio Wave Control Solar — JDM, Seiko Epson 25-year long-service award edition
• Case & Movement Reference:7B22-HAA0
• Caliber:Seiko 7B22
• Movement Type:Solar-powered quartz with radio-controlled (atomic) time correction
• Accuracy:±15 seconds per year without radio reception
• Power Reserve:Approx. 6 months from a full charge, up to 18 months in power-save mode
• Calendar:Full auto calendar, date aperture at 3 o’clock
• Dial:Black with textured centre disc, applied polished indices and city / time-zone perimeter markings
• Case Material:Stainless steel
• Case Diameter:Approx. 39 mm (excluding crown)
• Water Resistance:10 bar, per the case-back marking
• Case Back:Stainless steel, engraved with the 25-year service commemoration, December 2008 and EPSON SEIKO RADIO WAVE CONTROL SOLAR
• Strap:Black leather with contrast stitching and pin buckle
• Production Date:December 2008, per the case back
• Origin:Made in Japan

Condition Report

The dial is excellent — no marks, blemishes or discolouration, printing crisp, all indices and hands intact. The crystal is clean and free of chips. The stainless steel case shows light hairlines and a few fine surface scratches from normal wear, most visible along the polished bezel and the case flanks; nothing deep, and the case retains its original shape and finishing. The engraved case back is sharp and fully legible. The black leather strap is in good used condition. The solar cell charges and holds, and the date change functions as it should.

Watch went through a recent service by a professional watch technician and keeps good time.

Comes complete with black leather strap.

Why This Watch

Three things make this one worth owning:

1. Provenance you cannot order

Retail Seikos are everywhere. A watch presented to a Seiko Epson employee for twenty-five years of service is not something that ever sat on a shelf — the engraving on the back ties it to one person and one specific month, December 2008. Internal presentation pieces like this were made in small batches for the recipients only, so they surface outside Japan far less often than the catalogue models.

2. Technology that still does its job

A solar cell and a radio receiver mean no battery changes and no time-setting, nearly two decades after it left the factory. Plenty of quartz watches from 2008 are sitting dead in drawers; this one charges from the light in the room and corrects itself against the atomic time signal.

3. A JDM steel case, not the common titanium

Most caliber 7B22 models that reach Western sellers are the titanium versions. The stainless steel cases were sold within Japan and give the watch more weight on the wrist and a brighter polish on the bezel and lugs.

Modes of payment:

• PayPal
• Credit Cards (VISA, MasterCard, American Express, Discover)

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 asSeiko,is a Japanese maker of watches, clocks, electronic devices, and semiconductors. Founded in 1881 byKintarō Hattoriin Tokyo, Seiko introduced the world’s first commercialquartz wristwatchin 1969.

Seiko is widely known for its wristwatches.Seiko and Rolex are the only two watch companies considered to bevertically 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, includingLorus, Pulsar, and Alba, while elevating its prestige through innovations likeSpring Drive, which helped push Seiko into higher-end territory. In the 2010s,Grand Seiko and Credorwere separated into fully independent luxury brands, while Seiko’s own global lineup now includesGrand 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 Maticdefined 1970s style with faceted crystals and colorful dials;Astronremains Seiko’s flagship GPS-solar tech line;Presagefocuses on traditional mechanical craftsmanship with enamel and urushi dials; andProspexdelivers professional-grade dive, field, and pilot watches often embraced by enthusiasts. At the top end,Grand Seikoemphasizes precision, Zaratsu polished design, and movements like Spring Drive, whileKing Seiko—revived in the 2020s—brings back sharp, elegant 1960s styling with modern calibres.

Finally,Credorrepresents 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.