The Aurora Optima Demonstrator, comes with a transparent body and rhodium-plated trims and with a solid 18k gold nib . The Nib comes plated to, for a better look. Aurora made available only 1936 numbered pieces worldwide.
Aurora Optima Demonstrator
They made the pen with a clear resin to see the pen’s function. The Aurora’s piston filling system has an occult ink tank that gives you enough ink to write several more pages. The piston lever remains extended, as a reminder to refill the pen.