Avant garde Geneva-based watchmaker Urwerk produces what they claim is the world's hardest timepiece, the 103.08 TiAlN (Titanium Aluminum Nitride, a coating less than 4 microns thick and much lighter than gold and platinum but much, much harder - more than 5 ½ times harder than steel). The watch runs about $70, 000 and has proven to be indestructible.
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