Genuine Rolex watches have serials numbers that are deeply engraved into the metal. The serial number is found behind where the band connects to the watch’s body, on the six o’clock side. You will find the model number on the 12 o’clock side. You can view the number by removing the band. For this, you need to use a pushpin or a small paper click to take away the pin which holds the band in place.
Those who counterfeit Rolex in Melbourne do not change the numbers. Instead, they print the same digits on every replica. You can research the serial number of a watch to know if it is mass-produced.