Nagasawa Fountain Pen Proske 21[Nagasawa Fountain Pen Proske 21]This fountain pen is a 21K gold version of Nagasawa Bungu Center's "Proske" fountain pen. The biggest feature is that even though it is 21K gold, the size of the nib is "medium sized". Usually, most manufacturers' 21 karat gold nib models are a combination of a large body and a large nib, which inevitably results in a heavier pen. Even if you wanted to enjoy a 21 karat gold fountain pen, it ended up being difficult to