Good afternoon, I am new at forum and (at the moment) also to the Mont Blanc fountain pens. I got option to purchase the fountain pen, but couldn’t match positive identifying and authentication of it. Could you please help me about it? What there should be; MB 146, dating around 2000, unused. The basic concerns are about: BoxNib colourNib feedComparing at other forum topics; could it be also 144?Thank you.