Seiko Prospex 39mm Speedtimer Solar Black/Steel

This Seiko Prospex watch features a 39mm stainless - steel case. It has LumiBrite on hands and indexes for easy reading in low light. The chronograph can measure up to 60 minutes in 1/5 second increments. A curved sapphire crystal protects the dial. It comes with a three - fold clasp that releases with a push button. Style number is SSC819.

Using this Seiko Prospex watch is easy. To start the chronograph, just press the relevant buttons to begin, stop, or reset the timing function. When you're done, make sure to turn it off to save power. As for daily use, keep it away from strong magnetic fields and extreme temperatures as they can affect its performance. To maintain it, clean the case and strap regularly with a soft, dry cloth. If you get it wet, dry it thoroughly. For any complex issues, it's best to take it to a professional watch repair service.