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The 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.

The Diffusion Demonstrator Pen is available in a limited-edition of 100.

$746.29

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The Diffusion Demonstrator Pen is based on the shape and style of the 1937 Onoto Magna and 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.

Material:

High-density acrylic with hallmarked gold-plated sterling silver fittings

Nib:

Onoto size 7 in gold-plated stainless steel

Cap fittings:

Hallmarked gold-plated sterling bands
Button – gold-plated sterling silver
Clip – gold-plated sterling silver with Onoto cipher

Barrel fittings:

Gold-plated sterling silver button

Dimensions:

Capped (closed): 144mm

Uncapped including nib: 127mm

Posted including nib: 166mm

Barrel diameter: 11 – 13.2mm

Cap diameter: 14 – 15.8mm

Cap length: 67mm

Weight:

32gms

Nib Options:

Gold-plated SS or 18ct carat gold
Fine, medium or broad nib as standard
Customised stub, italic or other styles available to order

Ink feed:

Plunger-Filler

All of our deliveries will be tracked and insured. The delivery charges are based on destinations:

UK under £50 – standard: £4.99 + vat; upgrade to Courier delivery: £9.99+vat
UK over £50 – standard: Free; upgrade to Courier delivery: £9.99+vat
EU - standard: 14.99 no vat; upgrade to Courier delivery: £24.99 no vat
Rest of World – standard: £19.99 no vat; upgrade to Courier delivery: £29.99 no vat

EU countries include Austria, Belgium, Bulgaria, Croatia, Republic of Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain and Sweden.

Items with standard specifications, i.e. no options are chosen, will normally be dispatched within 2-3 working days. Delivery lead time can be delayed in some circumstances. For example if you have requested personalisation of your order such as engraving or change of fittings.

If for any reason we are unable to meet our delivery commitments, we will contact you with a revised estimated delivery date or offer you the option to cancel or select other goods.

Read more about our delivery options here