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Initially the [[Dunn]] pens were made in [[hard rubber]] and were of good quality; the company distinguished itself by an extensive advertising campaign. The pump mechanism was simple and robust, and the pens were produced in a variety of models from small pens for women's to the [[Dreadnaught]] giant model (produced also in regular dimensions). An interesting feature, from a technical point of view, was also the introduction of a the caps composed by two parts, whose top section could be unscrew in order to discover the nib, but leaving it shielded by a protective cage in order to consent to fill the pen without pressing dangerously the nib on the bottom of the ink bottle.  

Initially the [[Dunn]] pens were made in [[hard rubber]] and were of good quality; the company distinguished itself by an extensive advertising campaign. The pump mechanism was simple and robust, and the pens were produced in a variety of models from small pens for women's to the [[Dreadnaught]] giant model (produced also in regular dimensions). An interesting feature, from a technical point of view, was also the introduction of a the caps composed by two parts, whose top section could be unscrew in order to discover the nib, but leaving it shielded by a protective cage in order to consent to fill the pen without pressing dangerously the nib on the bottom of the ink bottle.  

In addition to black hard rubber [[Dunn]] produced also [[bakelite]] pens with a transparent barrel (though most of the transparent models were later made in [[celluloid]]) boasting (rightly) of being the only transparent pen (with the model named [[Camel Tatler]]) to display the ink level, and a good 10 years before the [[Vacumatic]]. Are also known to exists, but to be very rare, some metal [[overlay]] pens.  

In addition to black hard rubber [[Dunn]] produced also bakelite pens with a transparent barrel (though most of the transparent models were later made in celluloid). Are also known to exists, but to be very rare, some metal [[overlay]] pens.

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