Domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides
316L Stainless Steel
3 bar (30 metres / 110 feet)
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.
An automatic watch is a watch that operates through the continued motion of the wearer's wrist. Automatic wristwatches don't need winding if worn daily. The energy is stored by using a half-disc metal weight, called a rotor, that spins when the arm is moved.