Dont have a problem but

Question

Dont have a problem but I have just purchased a Cartier Watch from Ebay how will I be able to tell if geniune or if it is fake the following description was given by the seller: Authentic Ladies Cartier Panthere 1 Row WatchRare Discontinued ModelGuaranteed AuthenticityDescription:? Panthere SM Steel/Gold Qtz ? Serial Number : 1057917006222 ? Last Service July 2007 (Still under 1 year Warranty) ? Had a complete service from Cartier in Bond Street London ? I had 3 stainless stell links added (the link are joined at the clasp so not visible when wearing, only the gold row can be seen) ? The watch is in PERFECT Working condition ? Has not been worn or used since its service, so "like new"Are you able to track the serial number to see if genuine before i part with £850.00. many thanks