Monte Rosa was Montblanc's second brand and thus the cheaper variant; the piece is an original. The nib designation KF stands for 'Kugelfeder' (ball nib) in fine, which is a rather rare variant. Historically, an independent fountain-pen firm 'Monte Rosa' also existed in Zurich about 90 years ago; the connection with Montblanc is not unambiguously clarified. Anyone wanting to start collecting classic Meisterstücks should rather test and buy the first pen at a specialist trade than buy blindly via eBay, in order to choose the right nib width.