The appearance of the watch is usually made of K gold, K white gold, high grade animal leather.
K gold, although the main raw material is gold, but the sweat of human hands is acidic plus the corrosion of air, over time is far from beautiful when new, which requires frequent cleaning and polishing to keep the watch long new. If it is K white gold, the outer silver layer wears off over time and the inner gold is exposed, it is not as white as it used to be, so it also needs regular maintenance white-plating to keep it looking new.Leather straps, not to mention the corrosion of sweat can cause the belt to harden and crack prematurely, and normal maintenance should avoid wearing a belt watch during sweaty and rainy periods. If the watch is made of steel for the case strap, it is more valuable to polish and refurbish it frequently.
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