Flamberg's wooden pen, the Sanpura, is made of Tochigi (Japanese horse chestnut) with curly grain. The stripes of the curly grain shimmer depending on the viewing angle. Used only for a test write since purchase. #NoharaKogei #KoboSetsu #CraftA #KobutaKobo #BonnanPen #BallpointPen #WoodenPen