I just wanted to indicate the Nomos Tangente Ref. one hundred and one is waterproof to 30m, not 100m. It doesn’t detract in the slightest degree from it even though. It’s a stunning timepiece! Quartz Movements: Quartz watches are powered by a battery and provide precision and simplicity of use https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/