PARKER pen, mechanical pencil, biros and rolling ball, Duefold model.Cylindrical barrel, lacquered in blue-grey watercolour, with gold-plated details on the clip and base. With original case.Measurements: 13 cm (length).The first Duofold model was created in 1921 at the express request of Lewis M. Tebbel, a salesman for the firm who wanted to offer his customers a fountain pen with these characteristics. Within a few months, Parker had sold more than 15,000 units despite its high price for the time. The Parker Duofold has undoubtedly become an emblematic symbol of the company.