Genius squared! That is what this modern Conklin Mark Twain fountain pen is. The first wave of genius was resurrecting the Conklin brand and Crescent filler, which is what this pen is. The second wave of genius was from the guy we got this from who replaced the modern nib and feed with a vintage Conklin Endura nib and feed! The feed doesn't fit properly in a technical sense, but it still works. It is just a little too long. You will write a firm medium line with a hint of feedback. This color pattern is called "peanut butter." The pen is in great working order, and looks like it is in mint condition, excluding its nib alteration. Comes with original box and papers. 14cm capped.