and I recently saw it again (in an ad) and made a note as to its name so to be able to look one up on the internet: Montblanc Meisterstuck Solitaire Royal Black Diamond
The price was EURO 125,000
In the mean time I have located a couple of pictures of the pen:
I am not sure if my writing would improve with that pen; I do know however that you can write with it at night without having to turn on the lights
Regards,
Edwin