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It is best known for marketing in [[1932]] the [[Duocolor]], a double pen allowing you to either use two separated pens loaded with different colors. This pen is identical to [[Zerollo]] and in essence is nothing more than a rebranding of the Genoese company products.

It is best known for marketing in [[1932]] the [[Duocolor]], a double pen allowing you to either use two separated pens loaded with different colors. This pen is identical to [[Zerollo]] and in essence is nothing more than a rebranding of the Genoese company products.

Come per la [[Zerollo]] la penna ebbe un successo limitato, proprio per la fragilità meccanica dovuta alla notevole complessità della stessa, considerata la relativa utilità della soluzione. Era inoltre costosa, per cui alla fine ne vennero prodotte poche ed è pertanto fra le più ricercate e le più care delle penne francesi.  

As for [[Zerollo]] the pen had limited success, because of the mechanical fragility due to the considerable complexity of the same, and the relative utility of the solution. It was also expensive, so in the end a few were produced, and is therefore one of the most sought after and most expensive French pens.  

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