Apart from telling the time, a watch is also an exercise in materials science. Typical materials include stainless steel (lightweight and unlikely to corrode), ceramic (heat-resistant with a touch of modernist style) and titanium (half the weight of steel but twice as strong, though expensive). Then there’s white, red and yellow gold, or, if you’re feeling flush, platinum. All are strong, but pricey, and a lower carat equals softer metal prone to scratching. Silver and bronze are also out there, but rarely used, due to their delicacy. Finally, there are chemical or diamond-like carbon coatings (often used by Bell & Ross), for a thin but tough veneer.
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