Brand: Montblanc (German)
Nib: Platinum coated 14K XXF (writes in between Japanese Fine and Extra-Fine)
Filler: Integrated Piston (~1.2ml capacity)
The smoothest pen I currently have at a western XXF tipping. Not only is the nib platinum coated but the cap is also platinated.
Also one of the easier pens to disassemble. (Video Source: SBREBrown)