SFJ003 is Seiko’s innovative Caliber 8A50 solar movement, which draws energy from any light source — no battery replacement needed. The dial includes three chronograph subdials for measuring 1/100-second, 1/10-second, and 60-minute intervals, plus a tachymeter scale on the bezel for speed tracking.
Crafted in a rugged stainless steel case and paired with a black silicone strap, this chronograph is designed for comfort and durability. A scratch-resistant sapphire crystal provides premium protection, while 100-meter water resistance ensures dependable performance in daily and sporty environments.
Key Features:
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Model: Seiko SFJ003
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Collection: Prospex Speedtimer
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Movement: Solar-powered Quartz (Caliber 8A50)
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Functions: 1/100-sec chronograph, 1/10-sec, 60-min counter, tachymeter
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Case Diameter: Approx. 42mm
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Dial: Black with high-contrast chronograph subdials
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Crystal: Sapphire
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Case: Stainless steel
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Strap: Black silicone with buckle
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Water Resistance: 100 meters (10 bar)
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Clasp: Pin buckle closure
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