This is the classic green color. It's a superb item. There are no cracks, chips, malfunctions, or engraved names. The nib width is M (medium). It's a well-balanced nib width, neither too thick nor too thin. This is a rare model that is no longer available new. Especially with many pens on the market that haven't been tested for functionality or are broken, this pen has been tested and is in working order. If it turns out to be a fake, I will provide a full refund (including shipping costs). Please note that this listing is for the pen body only. If you would like the box, please let me know, and I will sell it to you 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 desire for a re-release 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 rich 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.