Correct. It's a piston filler. Anyway, judging form the rear of the hood, there is no cartdrige to fit there.
I'm sad that it misses the metal ring in mine, and threading de hood in the barrel, even squeezing it tight, the gap from metal ring could be noticed
The ring was part of the cap closure system IIRC and it's likely the cap will not be secure and the nib may dry out more without it.
I see. I have either a Lamy ratio (100% like de L6 in the photo: http://pointythings....ens/noslamy.php) that have the exact same ring, and I got it's function.
Should it be easy for me to find a ring for my monte rosa? So I could restore it and put it to work?