For some decades Sheaffer experimented with mechanical complexity in fountain pen engineering; the Touchdown filling mechanism was a relatively straight-forward complication, used in many pens.
On the technical aspects of fountain pens:
[ Ссылка ]
![](https://s2.save4k.ru/pic/T9TcUnNKDcE/maxresdefault.jpg)
For some decades Sheaffer experimented with mechanical complexity in fountain pen engineering; the Touchdown filling mechanism was a relatively straight-forward complication, used in many pens.
On the technical aspects of fountain pens:
[ Ссылка ]