It's got a domed acrylic crystal facial area, leather-based strap, and a lightweight Establish that makes this observe cozy put on throughout the day. Have in mind: Acrylic crystal isn't as scratch-resistant as sapphire or mineral crystal; the leather-based band may present wear a lot quicker than anticipated. William’s charting, https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/