Days Three Section Ballpoint Pen in Yellow / Basil by Anterique X Marks Inc.Days mini ballpoint pen by Anterique X Marks Inc. The Anterique x Days is a retro inspired ballpoint pen that combines modern technology with 1960s classic design. It features a 0. 5mm Mach Ball Ink tip and a low viscosity ink that is designed to glide smoothly and create sharp lines. The pen is lightweight and slim, with a clip that makes it easy to carry around. This 3 section design combines vibrant colour blocking with a silky smooth writing