Seiko Men&#39;s SNAC93 Excelsior Alarm Chronograph Silver-Tone Watch Reliable Japanese-quartz movement One-hour and 60-second registers; stopwatch measures 60 minutes in 1/5-second increments Elapsed time and split time measuring; tachymeter scale Main dial polished silver-tone hour and minute hands and sweep-seconds with luminous accents; Hardlex crystal Water resistant to 330 feet (100 M): suitable for snorkeling, as well as swimming, but not diving