Are there fake Patek Philippe watches?

Yes, there are fake Patek Philippe watches. One way to identify an authentic timepiece produced by the Swiss watchmaker is to examine the back of its case. Patek Philippe doesn't put reference or serial numbers on the case backs, but many fakes will display them. On a real Patek Philippe timepiece, you'll see either a Geneva seal or the Patek Philippe logo, which is a double P. You will usually also find markings that identify the type of material it is made from. If you're unsure of the authenticity of a particular piece, seek input from a certified appraiser or knowledgeable dealer. On 1stDibs, find a large collection of Patek Philippe watches.