S.T. Dupont Ligne 1 Small (Petit) · Diagonal ribbed guilloché · Gold · France
Decoration: Diagonal ribbed guilloché (oblique godrons). S.T. Dupont Ligne 1 Small (Petit). Model / Series: Ligne 1 Small (Petit). S.T. Dupont Ligne 1 Large (Grand) · Pointe de diamant guilloché · Gold‑Plated · France, c. 1960s–1970s.