The Esterbrook M2 fountain pen was designed by Henry Dreyfuss. One of its most distinctive features is the V-shaped notch on the top of the cap. It is a lesser-known model among Esterbrook pens, and its pump-filling mechanism is also rare. Its greatest advantage is its compatibility with 32 different Esterbrook screw-in nib units. The pen is in perfect condition and can be tested upon pickup.

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.