If you’re checking a Rolex before selling or borrowing against it, the...

https://wakelet.com/wake/EpZ8O2VQKdH0t_J_zLTXB

If you’re checking a Rolex before selling or borrowing against it, the reference number is engraved between the lugs at 12 o’clock, under the bracelet. Don’t pry it off yourself. Have a watchmaker or reputable buyer inspect it and document the watch.