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In [[1919]] the first [[lever filler]] and [[safety]] models were introduced, the following year the brand ''The Conway Stewart'' was officially registered (with the number 407502). In [[1922]] new models were introduced, including the [[Dinkie]],<ref>the date is uncertain, someone makes it go back to 1920 (see [http://www.mvburke.com/history.htm]), but this is what the company says on its website.</ref> which will become the most famous product of the company (so that the name became a registered trademark in [[1924]]). The [[Dinkie]] was a small and functional pen, which was produced in different versions for over 40 years. In [[1924]] [[Conway Stewart]] was the first British company to sell celluloid pens,<ref>someone dates the use of celluloid (as the creation of [[Dinkie]]) back to 1920, challenging the primacy of [[LeBoeuf]].</ref> The use of celluloid, for the variety and richness of the colors they used, is one of the distinguishing features of this brand.

In [[1919]] the first [[lever filler]] and [[safety]] models were introduced, the following year the brand ''The Conway Stewart'' was officially registered (with the number 407502). In [[1922]] new models were introduced, including the [[Dinkie]],<ref>the date is uncertain, someone makes it go back to 1920 (see [http://www.mvburke.com/history.htm this reference]), but this is what the company says on its website.</ref> which will become the most famous product of the company (so that the name became a registered trademark in [[1924]]). The [[Dinkie]] was a small and functional pen, which was produced in different versions for over 40 years. In [[1924]] [[Conway Stewart]] was the first British company to sell celluloid pens,<ref>someone dates the use of celluloid (as the creation of [[Dinkie]]) back to 1920, challenging the primacy of [[LeBoeuf]].</ref> The use of celluloid, for the variety and richness of the colors they used, is one of the distinguishing features of this brand.