Precision mechanics with mineral glass and metal crown. Specially for measuring pulse and breathing rate. Based on 15 pulse beats or 5 breaths.

• Timing capacity: 30 minutes (1/10 seconds)
• Pin lever, 7 jewels
• Glass parts are resistant to scratching and acid
• Metal crown is extremely resistant to solvents and thinners

Ideal for use in the chemical industry, paint workshops or photographic laboratories.

Weight: 120 g