c1927 Parker Green, Senior Duofold Pencil Imprint on Barrel: Parker Duofold SR. U.S.A. Imprint on clip: Pat. Sep 5-16 PARKER 1.1 mm lead
The Parker Duofold is a range of Fountain pens & Pencils produced by the Parker Pen Company. The first Fountain Pen model was produced in 1921 and was a large pen – 5.5 inches long when capped. It was made of a showy bright red hard rubber and expensively priced at $7.00, equivalent to $98 in 2018.