Modifiche

This is why in 1921 also [[Conklin]] started producing models with a peculiar [[lever filler]] mechanism, ingeniously constructed so that only half of the lever was in the open. With the introduction of the large dimension pens trend started by the [[Duofold]] also [[Conklin]] introduced  in 1923 the [[Duragraph]] model. The following year the [[Duragraph]] was renamed as [[Endura]] and the production was converted to celluloid. Initial model were in black or red hard rubber, but soon they were produced in celluloid, with different colors like ''Rosewood'', ''Black & Gold'', ''Lime Green'', ''Lapis blue'' and the rare ''Blue & Gold''.

This is why in 1921 also [[Conklin]] started producing models with a peculiar [[lever filler]] mechanism, ingeniously constructed so that only half of the lever was in the open. With the introduction of the large dimension pens trend started by the [[Duofold]] also [[Conklin]] introduced  in 1923 the [[Duragraph]] model. The following year the [[Duragraph]] was renamed as [[Endura]] and the production was converted to celluloid. Initial model were in black or red hard rubber, but soon they were produced in celluloid, with different colors like ''Rosewood'', ''Black & Gold'', ''Lime Green'', ''Lapis blue'' and the rare ''Blue & Gold''.

[[Image:Conklin-Endura-Colors-Set.jpg|thumb|Gruppo di [[Endura]] di diversi colori]]

[[Image:Conklin-Endura-Colors-Set.jpg|thumb|A set of [[Endura]]]]

L'[[Endura]] era il modello di punta dell'azienda, portando il nome inciso sul corpo e sul pennino. Venne prodotta in tre misure, una versione da taschino corta, una misura standard e la senior. A fianco di essa l'azienda introdusse una serie di penne economiche per studenti, con la stessa forma ma in unica dimensione pari al modello standard, che vennero prodotte in colori pastello a tinta unita.

L'[[Endura]] era il modello di punta dell'azienda, portando il nome inciso sul corpo e sul pennino. Venne prodotta in tre misure, una versione da taschino corta, una misura standard e la senior. A fianco di essa l'azienda introdusse una serie di penne economiche per studenti, con la stessa forma ma in unica dimensione pari al modello standard, che vennero prodotte in colori pastello a tinta unita.