Parker Duofold MK I Red Marble Rollerball PenThe Parker Duofold Red Marble Rollerball is a high end writing instrument that is part of Parker's Duofold collection. Produced around 1988. The pen features a green marble design on its barrel and cap, which is created by layering different shades of green resin to create a unique marbled effect. The pen also features polished chrome trim and a Parker arrow clip, which adds to its elegant appearance. The pen has a twist action mechanism that deploys