Parker 51 Ballpoint Pen | Midnight Blue Barrel with Chrome Trim | Medium Point with Black Ink Refill | Gift Box

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While the same design of collector isn't often used in modern pens, it's very normal now for pens to have a lot of fins connected to the feed, holding ink close to the tip and ready for use, even in rollerball pens. The collector lives on, influencing the design of many pens all over the world. Parker's continual advertising during the war created demand that took several years to fulfil after the end of the conflict.

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

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Above: In 1947-48 Parker produced a demi-sized version of the 51 Vacumatic. All parts except for the barrel and cap were identical to the full sized 51. An uncapped Demi is about 11.2cms long whereas the full sized 51 is 12.8cms The Parker 51 Aerometric Above lower: In addition to the full size 51, Parker also produced a demi aerometric version. This was identical to the larger pen, just proportionally smaller in all respects including the cap, and was in production until around 1960 The Parker 51 was first released in 1941. The first pens utilised the sacless pump system, borrowed from the Vacumatic and they were immediately successful. The pens made during the First Year have a number of distinct identifying features and are now extremely collectable and rare. The Vac 51 lasted until 1947 when it was phased out in favour of the 'new' aerometric filling system. This aerometric filling system was used in virtually all 51s until 1978 when production in the UK ceased. Small changes and improvements to the 51 continued almost annually from 1950 on with the major redesigns in the late 1960s with a streamlined Mark 2 followed by the final Mark 3 version in around 1975. A wide range of 51 variations were produced in both the UK and USA with slightly different timelines, and it is not unusual to find different colours, cap styles and imprints in US and UK production 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 aircraft in its advertising.

In 2021 a reimagined version of Parker "51" was released. [9] [10] The 2021 model had slight differents with its predecessor, being 4mm longer than the original 51. [11] Above: A 51 Aerometric Mk1 from the mid 1950s showing the shorter clip. Most 51s found in the UK are similar to this, with production running until probably at least the late 1960s Above: The 51 Aerometric Mk2 introduced in the late 1960s featured a 61 style cap with plastic jewel, a slightly shorter barrel with flattened rather than rounded end amongst a number of other differences. Importantly, the front shell and barrel were still made from lucite with the barrel threading being the same as on the Mk1 The 51 was a unique product and shook the world on its introduction. The torpedo shaped design and the hooded nib became icons of style and were copied by virtually every other pen manufacturer. It is no exaggeration to say that the Parker 51 is the most popular, reliable and functional pen ever invented.

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The history of the pen is as follows, note that there is inconsistency amongst the experts about the names of the different types of 51, some regard the Vacumatic 51 as a seperate entity and the aerometric is the Mk I, I prefer to follow David Shepherds philosophy as outlined below; 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" PVC sac. [2] Shepherd, David; Shepherd, Mark (January 2004). Parker "51" (1sted.). United Kingdom: Surrenden Pens Ltd. pp.102–104. ISBN 0-9546875-1-5. Lauren Hubbard. "Queen Elizabeth Has Used the Same Brand of Pens for Almost 60 Years". Town & Country Magazine . Retrieved 10 Jul 2021.

The original Parker 51 pen was the biggest selling and probably most practical fountain pen ever made. It never leaked, always worked and rarely broke. With sales in excess of 20 million pens, it was ‘like a pen from another planet!’ It rapidly became 'the world's most wanted pen'• Fully serviced vintage Parker 51s for sale Made in France - see the images for some more information from Parker, along with the below 'marketing' text they have prepared: Above: The mid 1970s saw the final version of the 51 Aerometric - the Mk3. This had the later 61 cap with metal clip jewel. One important change was that Parker changed the type of plastic used for the shell and barrel to a softer version which is prone to shrinkage and also distortion from the pressure of the metal clutch inside the cap. Threading on the front shell and barrel was also coarser than on the Mk1/Mk2, so parts from these models will not fit the Mk3 The Vacumatic filling system was developed by Parker in the early 1930s. Ink is drawn in to the pen by repeated pushing of a plunger at the end of the barrel. This flexes a rubber diaphragm attached to the plunger with the partial vacuum drawing ink into the barrel. Ink is held directly in the barrel - the pen does not have a conventional ink sacIn 1947, Parker’s factory in England also started producing 51s for the British and European markets and, with the Vacumatic filling system being seen as overly complicated, Parker worked towards a new type of filler which was longer lasting, more reliable and simpler to use. In 1949, the ‘New Aero-metric Parker 51’ was launched in the USA and described as ‘a clear case of improving on perfection’. Instead of the button operated rubber diaphragm filler, this new 51 came with a PVC pli-glass reservoir with a 30 year life expectancy - an astonishingly long life given that most pens then required a service every 5 years or so. In the event, even this projection proved to be a little pessimistic as 51s continue arriving here every month for their first service and sac replacement in 70 years! English production of the Aerometric commenced at Newhaven in 1950. 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. For deliveries to the Rest of the World, Royal Mail suggests up to 21 working days for parcels to arrive. wanted’ – retaining its distinctive streamlined silhouette and iconic hooded nib; yet is made for the future – this pen is hand assembled and made from durable precious resin, benefitting from Parker’s expertise and reputation for superior craftmanship.