Tissot TISSOT SEASTAR 1000 POWERMATIC 80 GMT T120.429.11.051.01
This material, recognised to be one of the hardest substances, has been used at Tissot for decades. It is perfectly suited to the external parts of a watch that is exposed to daily scratching and impacts. Ceramic ingredients include aluminium oxide and zirconium, which means that it will never oxidise no matter how much time passes. That means the watch will never lose its shine. It is known for its hypoallergenic properties and is well suited to any wrist.