It's got a domed acrylic crystal experience, leather strap, and a light-weight Develop that can make this observe snug use throughout the day. Remember: Acrylic crystal is just not as scratch-resistant as sapphire or mineral crystal; the leather band may demonstrate put on more quickly than predicted. The Diver 300M https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/