By the end of 1950, Eversharp had fallen into crisis, leading to its acquisition by Parker starting in 1957. The Eversharp name continued to appear on several Parker pens until 1968. One unique aspect of this particular pen is that it was manufactured by Penol in Denmark in 1964. Another unusual feature is its ink feed system, which uses two nylon threads. It is an extremely rare pen and operates with a Parker converter.

The Parker 21 series, produced for seventeen years, was modeled after its big brother, the Parker 51, and released in several variations. This type features one of the most reliable filling mechanisms—its ink sac still performs excellently even after 70 years. The pen comes with a one-year warranty.

This De Luxe model with a gold-plated clip belongs to the first series and was made in 1950. Its filling system is among the most reliable (I’ve never had to repair one), and the ink sac still holds up even after 70 years. One thing to watch out for: do not overtighten the barrel, as it may crack. Comes with 30 ml of ink and a one-year warranty. The pen can be tested upon pickup.

Ariel Kullock is an Argentinian innovator, artist, and customizer of fountain pens. Since the 1990s, he has been creating unique fountain pens—starting with modified Parker 45s, later moving on to Parker 51s using new barrels, section parts, custom caps, and fully reimagined Parker 51 “fantasy” pens. This is one of his early pieces. The pen comes with a 1-year warranty and can be tested upon pickup.