This is a highly rare Montblanc Turbo fountain pen, a Porsche collaboration ballpoint pen from the late 1970s. The fountain pen version of the Montblanc Turbo, a very limited edition, is extremely rare. This is a rare collector's item for Montblanc collectors. The pen features a hairline silver-colored body and a grip section with a ball-shaped hole pattern at the top of the nib. As the second model in Montblanc's Carerra series, it was designed in collaboration with Porsche, inspired by the silver and black two-tone body of the Porsche Carrera Turbo, with a ball-shaped pink clip tip, and a large round white star mark on the cap's crown. A large round white star mark is also featured on the tail end of the barrel. It was produced in collaboration with the image of the cutting-edge super sports Porsche Carrera Turbo, breaking away from the usual Montblanc models at the time, and was produced in very small quantities, making it a phantom Montblanc. The 585 nib, which has been a favorite of many fans for years due to its unique feel, is silver-colored, and the nib size is F. Both the body and the cap have been buffed, resulting in a shiny, glossy hairline finish. Therefore, among the very rare TURBO series, this is one of the least sold, with a hairline metal & black color hole design body, and an innovative design and ball holes that are characteristic of the TURBO of the super sports Porsche at the time. The large white star mark gives this item a unique world view. The Turbo model was produced by Montblanc in the 1970s, with the Carrera series and the Turbo series, in a practically limited small production run. The barrel is also engraved with "turbo" and "MONTBLANC GERMANY" on the back, and it is officially named Turbo. This model can accommodate current Montblanc genuine cartridge ink. I believe it is in good condition, but please understand that it is a vintage item that has been stored at a private home for a long time. Feel free to ask any questions. Also, I have many other wonderful items for sale, so please take a look if you like! ＼(^o^)／