I am selling this Montblanc Pix-O-Mat reference 2722 four color ballpoint pen from the eighties. The pen was used but still looks very good, the four fillings have been replaced for brand new ones. What makes this pen special is the gravity based selector, by keeping the color of your choice upwards and then pressing the button then that color's filling comes out. The selector mechanism works and the pen writes well. What makes this pen special is that Montblanc stopped producing multi color pens in the 1980's. This auction is started without a reserve price, please examine the photos before bidding.