Bemiddelen Symfonie breng de actie rotring quattro pen vervolgens Versnellen Ongunstig
Rotring Quattro Executive Stylus Review - The Gadgeteer
Just finished making this custom Rotring Quattro pencil w/ .3mm, .5mm & 2x .7mm. Took some work to get 4 mechanisms to all fit and function, proud of how it turned out :