see ebonite

A lever-like device shaped like a hatchet so that the protruding end goes through a slot in the barrel and depresses a pressure bar to fill the pen. Thus the filling system like a lever filler, but the "lever" is flipped completely over for use. The hatchet-filler was introduced by the John Holland Co. in 1915."

Nib almost completely covered by a plastic "hood" - only the very tip of the pen is exposed. Sometimes called a shrouded nib."

A Waterman from the '40s that featured a hundred year guarantee. They were offered in three sizes and several colors, and with smooth barrels and those with distinctive concentric ridges.