Three most important points for watch maintenance:more importantly, Rolex sapphire protector Made a fighter in the product, not afraid of any competitor’s attack. https://finewatchcare.com/collections/rolexwatch-protection-films
The most important first point: accuracy
Accuracy is the three most important points for watch maintenance: first, of course, accuracy. The average standard should be within plus or minus ten seconds, preferably within plus five seconds.