It's a domed acrylic crystal facial area, leather-based strap, and a light-weight Construct that helps make this observe snug wear during the day. Take into account: Acrylic crystal isn't as scratch-resistant as sapphire or mineral crystal; the leather band may present put on quicker than expected. Even further to that, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/