Additionally, instrument makers devised specialized pens for creating curved and dotted lines. Surveyors, navigators, and draftsmen also used pencils and crayons in holders such as those seen in the ...

Common mechanical pencils come in sizes to accommodate 0.5, 0.7, and 0.9 mm leads, but there are bigger and smaller ones available. Perhaps one of those really large drafting lead holders could be ...

Powell National Air and Space Museum Drafting Pen, William J. Powell National Air and Space Museum Pens, Lindbergh, King Collection National Air and Space Museum Pen, Lindbergh, King Collection ...