The J.P. Morgan officially exists only as a fountain pen; a rollerball or ballpoint version with limitation number x/4810 is not in the programme and thus most likely a counterfeit, even if 925 stamps and mother-of-pearl star can look deceptively real on photos. Occasionally there may be conversions, which however would not justify an official limitation statement. In the specific case, the seller himself stopped the auction after a hint in order to check the originality at a boutique.