The Parker Duofol is one of the most recognizable and enduring fountain pen designs. Launched in 1921, the original Duofold — nicknamed “Big Red” — was a large (5.5 inches capped) pen made of a showy bright red hard rubber and priced well above its competition at a staggering $7.00. Despite the high price tag, the pen was a phenomenal success and put The Parker Pen Company squarely into the front rank of fountain pen manufacturers.