When Pelikan registered the patent for the differential piston mechanism in 1929, nobody knew that the same technique would survive for decades. To this day, only a few small changes have perfected the piston mechanism, and the Demonstrator model, which was first introduced in a different size just to show how it works, became a global success. Technically minded people are fascinated to see the mechanism in action every time they refill their fountain pen. 

 

Pelikan M205 Blue Demonstrator Fountain Pen

$180.00 Regular Price
$153.00Sale Price
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