Rolex has their model numbers located between the watch lugs under the bracelet.An authentic Bvlgari will have six digits in its model number. Breitling, Tag Heuer, and Bvlgari all have easy to find model numbers on the back of the cases of their watches.How to Find Your Watch Model Number?Īccording to Crown & Caliber, the way to find a watch model number depends on the brand of the watch manufacturer. The serial number on your watch may be obvious, but if it’s not, you’ll first need to know how to find the model number. Serial numbers can also be used to identify a genuine Rolex from a knock-off being sold on a questionable site. In case of a loss or theft, the serial numbers on a watch are used to track it. Just like every dollar bill has a serial number, every watch has a serial number. Just as a fingerprint can identify a specific person, a serial number lookup can find whatever product it is linked to. A serial number is a one-of-a-kind identification group of numbers, or numbers or letters, which is assigned to a specific piece of hardware, banknote, or similar documents.