Do those magical, mystical crystals the so-called ‘new age’ folk swear by actually work? Who knows. The quartz crystals used in low-cost watchmaking, however, have well and truly proven their efficacy. In a quartz watch movement, a battery sends an electrical signal through a piece of crystal, driving the watch’s hands and functions. They’ll keep perfect time for three or four years, the life of the battery.
A watch’s energy, meanwhile, is stored in a coiled mainspring, and is released as this gradually unwinds, powering the watch’s timekeeping functions and other complications. The number of hours of energy the mainspring provides before it needs winding—or, in the case of an automatic watch, a decent wearing or a thorough shake—is known as power reserve.
We won t go into greater detail…
