This is a black model, which is less common than the green one. There are no cracks, chips, or malfunctions, and no engraved name. The nib width is EF (Extra Fine). This is the most popular nib width because it makes it easy to write fine Japanese characters. This is a rare model that is no longer available new. While many pens are sold without proper functionality checks or with existing problems, this pen has been tested and confirmed to be working. If it is a counterfeit, a full refund (including shipping costs) will be provided. Please note that this listing is for the pen body only. If you would like the box as well, please let me know, and I will sell it for an additional 2500 yen. The "Pelikan 400NN M&K" was manufactured in 1973 by MERTZ & KRELL, a related company of Pelikan at the time, in response to the Japanese market's demand for a revival of the masterpiece fountain pen 400NN from the 1950s and 60s, making it a relatively young vintage. However, you can fully enjoy the charm of vintage fountain pens, not only with its classic form but also with its ebonite feed and the tasteful color of the barrel. In addition, the softness of the nib varies greatly depending on the individual pen, and finding the writing feel that suits you is one of the unique pleasures of this fountain pen.