The pen in the video is for demonstration purposes only and not the actual pen in the listing. Montblanc 420 Fountain Pen Disassemble and Assemble Tutorial - YouTube. Descriptions of each item are true and correct. An item with flaws is stated according to its actual condition. Kindly READ the description carefully and refer to the photos provided before purchasing. The item "Vintage Montblanc 420G Fountain Pen" is in sale since Thursday, May 6, 2021. This item is in the category "Collectibles\Pens & Writing Instruments\Pens\Fountain Pens\Montblanc". The seller is "japantreasuretrove" and is located in Gifu-ken.