V126
The V126 is a model of fountain pen by Asvine. It's essentially a clone of Pilot's 823.
It uses a vacuum filling mechanism, so you need to unscrew its top every time you write a significant amount.
I can personally vouch for it gliding smoother than a Safari, which admittedly isn't much of a frame of reference.
Fountain pens: Eco | Joy | Safari | V126
Asvine: V126