Domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides
316L Stainless Steel
3 bar (30 metres / 110 feet)
Case Diameter: 28 mm
A quartz clock is a clock that uses an electronic oscillator that is regulated by a quartz crystal to keep time. This crystal oscillator creates a signal with very precise frequency, so that quartz clocks are at least an order of magnitude more accurate than mechanical clocks.
Case Diameter: 39 mm