Parker 51

The Parker 51 is a fountain pen first introduced in 1941. Parker marketed it as “The World’s Most Wanted Pen,” a slogan alluding to restrictions on production of consumer goods for civilian markets in the United States during World War II. Parker's continual advertising during the war created demand that took several years to fulfil after the end of the conflict.

Vacumatic and Aerometric Parker 51s

The pen and the ink were both named 51 to mark 1939, the company's 51st anniversary, during which development for the pen was completed (U.S. design patent No. 116,097, U.S. Patent 2,223,541 filed). By giving the pen a number instead of a name, Parker avoided the problem of translating a name into other languages.

Design and history

The Parker "51" stayed in production until 1972 with a series of revisions throughout its production cycle.

The "51" was innovative for the period. With a number of new design features in particular its hooded, tubular nib and multi-finned collector, were designed to work in conjunction with the pen's proprietary ink. This allowed the tubular nib to stay wet and lay down an even line with either the ultra-fast drying '51' ink or conventional inks. The initial model used a Vacumatic filling system which operated by pressing a plunger to generate a vacuum drawing ink into the pen.[1]

The filling system was re-designed in 1948, with the introduction of the Aerometric filling system. This filling system operated by pressing a pressure bar on "Pli-Glass" sac.[2]

In addition, Parker reformulated its "51" ink, reducing the alkalinity, and introducing a selection of brilliant colors, and calling the ink Superchrome. Like the 51 ink, it also came with a warning that it should be used only in the Parker 51 but the warning was more discreet.

The pen was not named after the P-51 Mustang fighter plane; but Parker took advantage of the coincidence by comparing the pen and the plane in its advertising.

Ink

There were two iterations of a special ink formulated exclusively for use in the Parker 51.

This initial ink was highly alkaline and while water-based, also included a substantial amount of isopropyl alcohol.

It was released in 1941 as "51" ink, along with the Parker 51 pen. Parker was careful to print prominent warnings on caps, labels, and boxes that the ink could only be used in the "51." The formulation in the ink would react with other manufacturing materials (such as celluloid) of the period leading to irreparable damage to other fountain pens. In 1948, the '51' ink was withdrawn and replaced with "Superchrome" ink, also advertised for the '51' pen and its economy model, the Parker "21" as the ink would still harm other fountain pens. "Superchrome" was discontinued by the early 1960s.[3][4] Although Parker no longer manufactures these specially formulated inks, the pen's construction is suitable for most modern inks such as Parker's Quink.

Legacy

A pilot who is suspected of falsifying flight records in his logbook in order to overstate his actual experience is said to have logged "P-51 hours".[5]

The 51 is popular with pen collectors, and in 2002 Parker issued a lookalike model called the 51 Special Edition. In 2004, the larger and heavier Parker 100 was released.

References
  1. US patent 2223541, Martin S. Baker, "Fountain Pen", issued 1940-12-03
  2. US patent 2612867, mark H. Zodtner, "Fountain Pen", issued 1952-10-07
  3. ToasterPastry. "User". Fountain Pen Network. Retrieved 28 April 2020.
  4. Shepherd, David; Shepherd, Mark (January 2004). Parker "51" (1st ed.). United Kingdom: Surrenden Pens Ltd. pp. 102–104. ISBN 0-9546875-1-5.
  5. "The Book of Hours". Air & Space Magazine. Retrieved 2018-08-13.

Regarding a 2021 reissue of the Parker 51: https://www.gentlemanstationer.com/blog/2020/8/19/5-reasons-why-parker-nailed-the-parker-51-reissue

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