Description
SEIKO Prospex SFJ003 Specifications
| Feature |
| |||
|---|---|---|---|---|
| Driving system | Solar | |||
| Caliber Number | 8A50 | |||
| Case material | Stainless steel | |||
| Case back | Solid screw | |||
| Band type | Bracelet | |||
| Band material | Stainless steel | |||
| Band color | Silver tone | |||
| Band width | 20 mm | |||
| Clasp | Three fold clasp with push button release | |||
| Dial color | Black with four inset black sub-dials including a separate time dial | |||
| Glass material | Curved sapphire crystal | |||
| Glass coating | Anti-reflective coating on inner surface | |||
| Hands | Luminous grey and silver tone hour, minute, second hand | |||
| Dial markers | Grey and silver tone batons indexes | |||
| Lumi Brite | Hands and index markers | |||
| Bezel | Fixed stainless steel | |||
| Crown | Push/pull out | |||
| Function |
| |||
| Accuracy | ±15 seconds per month | |||
| Drive duration | Operating for approximately 6 months (when fully charged) | |||
| Magnetic reluctance | Magnetic resistance 4,800 A/m | |||
| Water resistance | 10 bar water resistance (100 meters / 330 feet) | |||
| Size | Diameter 42 mm x Thickness 12.9 mm | |||
| Lug to lug | 48.3 mm | |||
| Weight | 152 g |
SEIKO Prospex SFJ003 Features
This solar-powered chronograph timepiece is from the Prospex Speedtimer watch collection which represents Seiko’s professional timekeeping heritage.
In the 1960s, Seiko announced itself on the international sports timing stage with a whole new generation of high-precision equipment. Seiko timekeeping is endorsed by international sports federations at many of the world’s leading sports events, starting with the 1964 Olympics and continuing into the IAAF partnership today.
Adding to the popular ‘Speedtimer’ watch collection, this particular design features an increased ‘go large’ case size – the original was 39mm, whilst this piece is 41.4mm, featuring a tapered bracelet, aluminum bezel and tachymeter for increased practicality and visibility. Conveniently, this watch charges from both natural and electric light.
Prospex timepieces are practical, reliable and durable within extreme or everyday environments, for sports lovers and adventure seekers alike.
- Screw case back
- Fixed stainless steel bezel
- Overcharge prevention function
- Chronograph up to 60 minutes in 1/100 second increments
- Split time
About Seiko Prospex SFJ003
History of Seiko
The company was founded in 1881, when Kintarō Hattori opened a watch and jewerly shop called “K. Hattori” (服部時計店 Hattori Tokeiten) in the Ginza area of Tokyo, Japan. Eleven years later, in 1892, he began to produce clocks under the name Seikosha, meaning roughly “House of Exquisite Workmanship”.
The first watches produced under the Seiko brand appeared in 1924. In 1969, Seiko introduced the Astron, the world’s first production quartz watch, it cost the same as a medium-sized car. Seiko later went on to introduce the first quartz chronograph.
