Retro 51 salutes Levenger with an exclusive capless rollerball pen. Just in time to help celebrate the 35 th anniversary of Levenger comes the Tree of Knowledge rollerball pen. Designed exclusively for Levenger with Retro 51, our Levenger rollerball utilizes the signature Tree of Knowledge imagery associated with Levenger since the company’s inception in 1987. Crafted of stainless steel and set off by polished brass appointments, the barrel’s printed pattern is protected by a high-gloss clear coating which gives it a special shimmer and a beautiful feel in the hand.