The Mark Twain Crescent Filler fountain pen. In 1898, Roy Conklin invented and patented the self-filling pen known as the Crescent Filler, and now it is recognized as the world's first practical self-filling fountain pen. Advanced for its time and featuring a reliable method for a filling mechanism, the Conklin® Crescent filler® attracted attention from many prominent figures of the day, and in 1903 the renowned American author and humorist, Mark Twain became the official spokesman for the Conklin® pen company. In celebration of Conklin's innovative design and Mark Twain's passion for the Crescent filling fountain pen, we are pleased to launch the Mark Twain Crescent Filler® as a limited edition all-metal pen with matching trim. Using today's new technologies and materials, we are able to recreate the original Crescent pen design in a limited edition series to appeal to pen connoisseurs who appreciate the history and creative times of the most innovative American pen company from the golden-era of fountain pens. The Mark Twain Gunmetal Crescent Filler® is limited to 1898 numbered pieces world-wide, the year that Conklin® was founded. Mark Twain's signature is engraved on the cap band along with the individual limited edition number for each fountain pen.