Translations:Stilus/11/en

These early hard rubber models were usually identified by a three-digit number, where the number of units referred to the size of the nib, the tens referred to decoration and the hundreds to the filling system. The safety models were identified by the digit 3 for the ordinary ones, and by the digit 4 for the ones using the company patented mechanism, while the lever filler used the digit 6, and the button filler the digit 7.