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The Seiko Prospex Speedtimer HBJ003P is a solar-powered chronograph built on Seiko's Caliber V192. It runs about six months on a full charge, so there is no battery to replace, and it keeps time to roughly ±15 seconds a month. The spec sheet is full for the class: a 1/5-second chronograph good to 60 minutes, a power reserve display, a 24-hour hand, a date window, a tachymeter bezel, curved sapphire with inner anti-reflective coating and 100 m water resistance. It is the same watch as the HBJ002P and HBJ005P apart from its dial colourway, so the choice between them comes down to looks. Owners rate it very highly, and the solar movement and finish are the usual reasons.
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Owners rate the Speedtimer very highly and single out the solar movement, the legible dial and the sapphire crystal. Complaints are few and mostly about the aluminium bezel and the 60-minute chronograph limit.
The Seiko Prospex Speedtimer HBJ003P is a solar chronograph watch powered by Caliber V192. It shares the Speedtimer design of the HBJ002P and HBJ005P, with its own dial colorway. The solar cell removes the need for battery replacement.
The watch has a tachymeter aluminum bezel and a 1/5 second chronograph that counts up to 60 minutes. It also has a power reserve display, a 24-hour hand and a date window. A full charge runs the watch for approximately 6 months. Accuracy is ±15 seconds per month.
The crystal is curved sapphire with an inner anti-reflective coating. The crown and caseback are screw-locked, and the watch is water resistant to 10 bar (100 m). Lumibrite on the hands and indices improves visibility in low light, and the watch is anti-magnetic. The stainless steel bracelet has a one-push triple fold clasp.
