Its distinctive diamond-pattern guilloché and the meticulous finishing characteristic of Dupont are its appeal. [Authenticity] The base is engraved with “S.T. Dupont de Paris – Made in France” and the serial number “D3JT07,” confirming it as an authentic vintage Dupont lighter. [Appearance] The exterior features a uniform diamond-shaped guilloché pattern, while the interior is finished in a gold tone. While showing signs of wear from years of use, such as scuffs and edge wear, this piece retains a distinctly vintage charm. [Functionality] Basic ignition tested and confirmed, as shown in the photos. As a vintage item, professional overhaul is recommended for long-term use. Only simple ignition has been checked; other functions are untested and not covered. [Accessories] Everything shown in the photos is included. [Shipping] - FedEx International - Estimated delivery time: Approximately 1 week (may vary by country/region) - Packaging: We will carefully pack your order using protective materials. - Customs duties/import fees may apply depending on the country.