Please be sure to check the profile. Purchased from a Louis Vuitton authorized directly managed store. The serial number is an RFID (IC chip) built-in product. M81939 Blue This is a Japan-exclusive key case. It comes with the pictured accessories, dust bag, and box. Recommended for gifts. It has been used a little, so please understand that there may be minor scratches on the metal fittings. Authenticity has been verified, but if you have any concerns about authenticity or are particular about details, please refrain from purchasing. Please refrain from asking questions or making requests after purchase. Please be sure to inquire before purchasing, including shipping requests.