Did you know that Mark Twain was a spokesman for a pen? Yup, and here it is. This exact replica of the original Conklin Pen Company Crescent Filler ($315) was used and promoted by Twain himself over a hundred years ago. Twain expressed his love for the self-filling fountain pen in an ad in which he stated: "I prefer it to ten other fountain pens, because it carries its filler in its own stomach, and I can not mislay even by art or intention. Also, I prefer it because it is a profanity saver; it cannot roll off the desk." However, the price might bring the cussing out.