The [[Radius]] initial production was divided in two lines: the [[Radius Superior|Superior]] for the more valuable high-end pens and more valuable, and the [[Radius Extra|Extra]] for second tier pens sold at lower prices. The [[Radius Superior|Superior]] line remained in production, with different stylistic and technical changes, including the implementation of [[Radius Superior Trasparente|Trasparente]] version, until the '50s, while the [[Radius Extra|Extra]] line was decommissioned in the late '40s, replaced by other economic production, such as the [[Comet]] and the [[Radius 31]], [[hooded nib]] models of much lower quality than its predecessors. | The [[Radius]] initial production was divided in two lines: the [[Radius Superior|Superior]] for the more valuable high-end pens and more valuable, and the [[Radius Extra|Extra]] for second tier pens sold at lower prices. The [[Radius Superior|Superior]] line remained in production, with different stylistic and technical changes, including the implementation of [[Radius Superior Trasparente|Trasparente]] version, until the '50s, while the [[Radius Extra|Extra]] line was decommissioned in the late '40s, replaced by other economic production, such as the [[Comet]] and the [[Radius 31]], [[hooded nib]] models of much lower quality than its predecessors. |