Parker 51 with F nib, Black
Few fountain pens are more highly regarded as a “classic” than the Parker 51. This particular pen is an early 1960s Special with a 14k gold nib.
Iconic design, hooded nib, very light without the cap. A nice, even balance when not posted and perhaps a little top-heavy when posted. The body can get slippery at times.
Comes with an aero-metric filling mechanism, an eye-dropper system that sucks up ink when depressed. The ink capacity is quite large. However, the ink sac does not unattach from the pen so flushing the pen can be more tedious than normal.
The writing is extraordinarily smooth and wet. In fact, the line sometimes looks closer to a medium due to the sheer volume of ink it puts out. On cheaper notebook paper, the wetness is almost a downside as the ink feathers on the paper; but on thicker, ink-resistant Clairefontaine paper, it writes effortlessly and looks sharp.
The price varies. This pen was $165 from Mike McConnell of mostlyparker51.com, but it is definitely possible to get them for less from online auctions or classifieds.