Breguet

Hi, I have a Breguet 1328 - chronograph with leather strap which has a metal clip. On the clip it says Briguets 2000. Just wondered if anyone could tell me anything about this watch and how authentic it is and whether it is a copy or genuine and if of any... 

1328 with some letter after it is the serial number of the watch. 5460 is the model, BB meaning white gold IIRC.