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'' present only on smaller models.

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'' present only on smaller models.