I have a Sheaffer Lifetime Triumph 1000, Vac/plunger-fill in Marine Green Striated, with two-tone 14k conical nib, a self colored section and an unusually clear visulated barrel. In hue/color/variation and in visualation (is that a word?) it bests all four Pelikan 400nn I have owned (both Tortoise and green) . I haven’t measured but I would not be surprised if it sucks in as much ink as the Pelikan. It is a fantastic pen in every way, reliability and robustness, ink capacity, is a great writer, and aesthetically pleasing pen. Mine's been ground to a .9 stub. It is just a fantastic little pen. The plunger knob is a little loose but otherwise it looks like it rolled off the assembly yesterday. Pictures don't do these little pens justice.
I adore mine. I would use it more if it were not so small.