For a San Diego Rolex owner, match the serial and reference to the paperwork,...

https://station-wiki.win/index.php/If_I_Lost_My_Rolex_Box,_Is_It_Still_Worth_Selling%3F

For a San Diego Rolex owner, match the serial and reference to the paperwork, but don’t treat papers as proof. The reference is engraved between the lugs at 12 o’clock. Ask a reputable watchmaker to inspect it before selling or borrowing against it.