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- Intended Use: Science, sports, time and motion studies
- 1/5 second and decimal minute (1/100 or 0.01 minute) scales
- Sweep second hand makes one revolution in 60 seconds, 30 minute register
- Rugged 15 jewel lever movement
- Shock-resistant, anti-magnetic movement
- Temperature-compensated hairspring
- Starts, stops, and returns to zero by successive crown depressions