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.
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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 1916 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.
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[[Image:1922-11-Parker-Duofold-RHR.jpg|thumb|left|[[Duofold]] advertisement from '20s.]]
[[Image:1922-11-Parker-Duofold-RHR.jpg|thumb|left|[[Duofold]] advertisement from '20s.]]