Refined S.T. Dupont ballpoint pen, crafted in solid sterling silver (925) with vermeil finish (plaquet d'or), made in France. The pen bears the original S.T. Dupont hallmarks, including “Made in France” and the 925 silver mark, and features the brand’s classic twist-action mechanism. Supplied with the original S.T. Dupont presentation case and period French retailer documentation, confirming provenance and authenticity, with matching serial number E7DT89, clearly visible in both the pen and the documentation. Based on design, hallmarks and documentation, the piece dates to the 1970s–early 1980s. Condition is very good to excellent, showing only minimal signs of careful use. One refill is fitted and still writes; an original spare refill is included but dry. A timeless French luxury writing instrument, highly desirable for collectors and enthusiasts of fine writing tools.