Mechanics 3 min read
The simple science of quartz watches
Learn how a battery, a tiny crystal and a simple circuit work together to keep your quartz watch running with highly reliable accuracy every day.
Calvin Klein
Ref. 25200533
The Calvin Klein Motion takes a 23 mm strap: measure between the lugs and that is the only number you need. With a 39 mm case and 30 m of water resistance, a strap of medium thickness keeps the balance. Quartz movement. Most straps here come with quick-release spring bars, so the swap takes a minute and no tool.