Retro Chronograph Men Watches ST1901 Mechanical Movement Hand Winding Men Wristwatches Sapphire Crystal Waterproof Military Pilot Watch for Men

Description

Product Description Chronograph Watch A chronograph is a complication that measures the length of a certain interval of time without interfering with the normal chronograph function of a watch. ST1901 mechanical Movement ST1901 Movement, mechanical hand wind, fully wind up can provide 40 hours power reserve, doesn't need battary, stable and accuracy. 30M Waterproof 30m water resistant, suitable for daily life, such as washing hand, rainning or doing housework, but not for swimming and diving. Synthetic Sapphires Mirror Synthetic sapphires are capable of reaching a hardness of 9 on the Mohs scale. In nature, the hardness of sapphire crystal is exceeded only by that of diamonds. Because of their extreme hardness, watch mirrors made of sapphire are highly resistant to shocks and seals and are scratch-resistant. Some Tips When you first wear this watch, you need to wind it 1.Keep the crown on the normal position. 2.Turn the crown clockwise 30-40 full turns or Gently rotate the crown until it can feel a little tight. 3.Keep away from the magnetic appliances such as bluetooth speakers, TVs, and mobile phones. 4.30m water resistant, only suitable to daily life, such as wash hands, but not for swimming and diving.