It's a domed acrylic crystal facial area, leather-based strap, and a light-weight Construct that tends to make this enjoy cozy use throughout the day. Bear in mind: Acrylic crystal is not really as scratch-resistant as sapphire or mineral crystal; the leather band could possibly demonstrate put on speedier than expected. https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/