I have a black caviar jumbo with gold hardware and wanted to sell since I do not use anymore and thought I would buy new Chanel. Preowned designer seller told me that they could not accept any registration number beginning with 176 or 177. They said they had some agreement with Chanel. Somehow I got the impression they were not sure it was authentic. Anyway, I bought this bag from Saks and I know it is authentic. Does anyone know anything about this or have had a similar experience? Would love to hear from you.. Thank you.