Designed accordingly to the golden number, the pentagram and the nautilus.
The golden number 0.618 is the proportion of the cap with the length of the open or closed pen.
The pentagram is the cross section of the pen itself, ergonomically adapted to a writing instrument.
The Nautilus is known as the "Golden Spiral". It embodies the pen all around the cap and barrel.
Hook Safe Lock®. Push and pull touchdown ink filling system