Brand: S.T. Dupont Model: Ligne 1 BS (Small Model) / Diamond Head Pattern (Grains d'orge / Diamant) Material: Silver-plated (with gold-toned inner mechanism) Serial Number: AY5747 (hand-engraved on the bottom) Origin: Paris, France (Made in France) Refill Color Code: Yellow (the cap valve features the correct yellow inner paint marking) Personalization: None (no initials or engravings on the personalization plate) Mechanical: In perfect working condition. It produces a strong, clean flame, lights reliably, and has a smooth wheel mechanism. Service: Recently fully serviced. All internal seals and O-rings have been replaced to ensure leak-free performance and longevity. Cosmetic: Good, vintage condition. Shows some minor age-related wear, light surface scratches, and slight wear to the silver plating near the edges and bottom, which adds to its authentic vintage character. Please see photos for a detailed view of its cosmetic condition.