If you’re checking a Rolex before selling or borrowing against it in San Diego,...

https://wiki-aero.win/index.php/Can_I_Sell_a_Rolex_Without_Papers_and_Still_Get_a_Fair_Offer%3F

If you’re checking a Rolex before selling or borrowing against it in San Diego, ask a watchmaker to show you the reference number between the lugs at 6 o’clock. Don’t remove the bracelet yourself. Get a written offer and loan terms before handing it over.