2. Bottom of the watch: The label on the bottom of the watch is usually marked with the manufacturer's logo and some coding information, including the model of the watch.
3. On the warranty card: The warranty card contains the model of the watch and other important information.
4. Side of the case: The model can be found on the side of the case, especially outside the 6 o'clock position and 12 o'clock position.
5. Inside the clasp: Some letters can be seen inside the clasp, for example, "EO8" stands for a watch produced in August 2007.
6. Consult authorized Rolex dealers or visit Rolex brand official website for enquiry.