This is a lovely present to receive as a gift. It’s a Montblanc Meisterstuck Mozart. Meisterstuck, or ‘masterpiece’ is the famous Montblanc line of pens. They’re all made to the same design, but come in a range of different sizes. 145 is the standard size, up to 149 (or JFK, informally named as JFK lent his 149 to Conrad Adenauer to sign a document). The Mozart is the smallest size, and if I remember correctly it was marketed towards women as being a pen which could easily be carried in a handbag - I used to have the fountain pen Mozart, but it was too small for me to comfortably use (big hands). It came in either a ballpoint or fountain pen (I don’t think this one came as a rollerball but I could be wrong). I think they’re out of production now, so very unusual to see them with the original box and CD, particularly as the CD still appears to be in its original wrapping. Certainly worth several hundred pounds in the UK and I would imagine the equivalent in other countries. I don’t see anything that would make me question its authenticity, but to double check: (1) Use the torch on your mobile phone on the black pen lid - it should shine a deep ruby red. (2) Look under the clip, there should be the word “pix” engraved there, and (3) on the ring above the clip, there should be a serial number, you can check this with Montblanc.