This is a collectible item. There is no particular dirt on the brass parts, as shown in the photos. I would appreciate it if you could look at the photos for the condition of the pen. As shown in the photos, there are some small initial scratches that are visible when light is shone on them. The pen and its dedicated box are not affected, but the red paper case is slightly scratched. It is a used item, so please refrain from purchasing if you are concerned. Please feel free to ask if you have any questions. Search terms: Kobo-setsu, mechanical pencil, maple burl, limited edition, limited color, Nohara Koge, rosewood burl, rosewood red and white, black persimmon, kobuta-kobo, peacock wood, Staedtler, Pentel, Loft limited, Okayama denim, Lamy, zelkova, fixed metal tip, blue black, gunmetal, pencil wedge, marble wood, premium rosewood burl, Lamy 2000, Uni Jetstream, mechanical pencil, ballpoint pen, set, Rotring, Kobo-setsu, Craft A, MONO, HBK Handmade Studio, Sharbo x, zelkova, lead case, fountain pen, Rotring, wooden barrel, wooden barrel mechanical pencil, Lupo pen case, Pure Malt, Muji, Hacoa, Sharbo, Zebra, Pentel, Kaweco Special Blue, silver mechanical pencil, stabilized wood, rosewood, craftA, luddite, drafting mechanical pencil, Staedtler, Reg, United Bees, Luddite pen case, Lupo pen case, sea lion, Zebra, PILOT, S20, Smash, Jetstream Prime, Graph 1000, Glass Gear 1000, Acro Drive, Kaweco Special Red Edition, Everdraw