On most Rolex watches, the reference number sits between the lugs at 6 o’clock....

https://telegra.ph/Selling-a-Rolex-in-San-Diego-What-Homework-Should-I-Do-First-10-15

On most Rolex watches, the reference number sits between the lugs at 6 o’clock. In San Diego, use a staffed shop, ask for written terms, and get a dated receipt with clear photos of the watch’s condition before handing it over