Where are the serial numbers located on a Rolex watch? Do ROLEX® Serial Numbers provide Production Dates? How long should the battery in my quartz watch last? If I pull the stem out when NOT in use, will that save the battery? How accurate should my watch be? It Says Water Resistant, But Can I Swim With It? What makes a watch water resistant? How often should my watch be serviced? What does a complete service include? What are the "Jewels" in my watch? What is the difference between a chronograph and a chronometer? Will heat and cold affect the accuracy of my watch? What is the power reserve for a self-winding mechanical watch and how does it work?