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This is a great looking watch made in 1983 by Seiko. It's model number M516-4009. It is made from carbon fiber which was cutting edge at the time. All the functions work well and most are demonstrated in this video. For those interested, I no longer have this watch. It sold long ago. But I could not sell it without making a video. CORRECTION: In the video I say the record is about 10 seconds but I got a comment which pointed out it's actually closer to 5 seconds.
