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In fact, the ''"[[Lucky Curve]]"'' was simply a good feeder, which remained in production until [[1928]], and was used as a trademark for a number of pens, but there are doubts that the curved form actually had the effect to avoid the accumulation of ink, because much repairers cutted it, because the curved part makes it difficult to reinsert it between the nib and section.

In fact, the ''"[[Lucky Curve]]"'' was simply a good feeder, which remained in production until [[1928]], and was used as a trademark for a number of pens, but there are doubts that the curved form actually had the effect to avoid the accumulation of ink, because much repairers cutted it, because the curved part makes it difficult to reinsert it between the nib and section.

[[Image:Parker-Snake-Capped.jpg|thumb|A rare [[Parker Snake]] ]]

[[File:Parker-Snake-Silver-Capped.jpg|thumb|Una rarissima [[Parker Snake]] ]]

In the early years [[Parker]] began manufacturing good quality hard rubber pens. In this period it was famous for her silver overlay pens, and in particular for the [[Parker Snake|Snake]] pen with a snake shaped [[overlay]], that is sought after by collectors for its rarity, and for the [[Black Giant]] pen, characterized by a very large size. Another distinction point for [[Parker]] pens was the creation of [[button filler]], introduced in [[1913]] as reaction to the creation of the [[lever filler]], which was never been used in the company's flagship models, despite is diffusion between all the competitors of that time.

In the early years [[Parker]] began manufacturing good quality hard rubber pens. In this period it was famous for her silver overlay pens, and in particular for the [[Parker Snake|Snake]] pen with a snake shaped [[overlay]], that is sought after by collectors for its rarity, and for the [[Black Giant]] pen, characterized by a very large size. Another distinction point for [[Parker]] pens was the creation of [[button filler]], introduced in [[1913]] as reaction to the creation of the [[lever filler]], which was never been used in the company's flagship models, despite is diffusion between all the competitors of that time.

In [[1929]] the profits that were enormous suffered a steep fall, many producers failed and others had to sell off their pens at low prices. [[Parker]], that taken years to establish its brand, decided not to devalue his pens, and kept prices high for the [[Duofold]], but in order to compete in [[1932]] introduced a range of economic models, school-type, for which they did no advertising. These models did not have a name and are usually indicated by collectors as [[Thrift Time]], or ''[[Parker depression pen|depression pen]]''.

In [[1929]] the profits that were enormous suffered a steep fall, many producers failed and others had to sell off their pens at low prices. [[Parker]], that taken years to establish its brand, decided not to devalue his pens, and kept prices high for the [[Duofold]], but in order to compete in [[1932]] introduced a range of economic models, school-type, for which they did no advertising. These models did not have a name and are usually indicated by collectors as [[Thrift Time]], or ''[[Parker depression pen|depression pen]]''.

[[Image:1941-09-Parker-Vacumatic-Major.jpg|thumb|A [[Vacumatic]] advertisement of 1941.]]

[[Image:1941-09-Parker-Vacumatic-Major.jpg|thumb|Pubblicità della [[Vacumatic]] del 1941.]]

[[Image:Vacumatic-Major-Clip.jpg|left|thumb|100px|The [[Vacumatic]] arrow clip]]

[[File:Parker-Vacumatic-3rdGen-Major-RingedBrown-Clip.jpg|left|thumb|100px|La tipica clip a freccia della [[Vacumatic]] ]]

The company, the had wisely piled stock in the good period, continued to invest in research, testing new materials and new filling systems, up to the realization, in 1933, of the wonderful [[Vacumatic]], with the arrow clip drawn from ''Joseph Platt'' (patent {{Cite patent|US|D088821}}, who has since then become the company symbol) with a transparent tank thanks to the [[Sistemi di caricamento#vacumatic|new filling system with the same name]]. The new pen reported the company at the top of the market.

The company, the had wisely piled stock in the good period, continued to invest in research, testing new materials and new filling systems, up to the realization, in 1933, of the wonderful [[Vacumatic]], with the arrow clip drawn from ''Joseph Platt'' (patent {{Cite patent|US|D088821}}, who has since then become the company symbol) with a transparent tank thanks to the [[Sistemi di caricamento#vacumatic|new filling system with the same name]]. The new pen reported the company at the top of the market.