Onoto Diffusion Demonstrator

The Diffusion Demonstrator is a transparent pen, showing the plunger-filler mechanism within, with an inky pattern on the cap tassie & barrel, and complemented with gold-plated sterling silver fittings.

Limited Edition of 100 pens

Based on the shape and style of the 1937 Onoto Magna the Diffusion Demonstrator Pen features the iconic two thin and one broad cap bands of their famous predecessor, together with the famous Onoto cypher cap button. The clip features the Onoto logo and the distinctive ‘chevron’ pattern that has been used on many Onoto cap clips since 1905.