Features: - 1/5 SECOND RECORDER - 60 SECONDS per turn- 30 MINUTES per turn - 13 JEWELS- CASE: BRASS CHROMIUM-PLATED- START/STOP/RESET: CROWN- MANUAL WIND UP "Diamond Stopwatch" As the only mechanical stopwatch manufacturer, it has more than 40 years production experience, Diamond brand stopwatch mechanical series with proper structure, precise transmission and timing, the 13-jewel mechanical stopwatch can work perfectly between