Introduced by Sheaffer in 1912, the lever presses against a pressure bar which depresses a sac to fill the pen. Lever-fillers became the dominant fill mechanism for Sheaffer, Wahl and Waterman from the '10s through the '30s.

refers to a floral relief metal pattern best known in early Watermans. Some of Waterman's repousse pens are among the most beautiful and the most valuable.

Acetato di Cellulosa - un materiale che potrebbe sostituire il celluloide - pero e higroscopico e per cio non rimane stabile quanto in contatto con inchiostro. Puo essere utilizzato come fascetta - le pelikan sono fatte con la fascetta di acetato. 

A modern thermoplastic with great clarity and durability used to make caps and barrels for many contemporary pens.

Introduced on the Parker 51 in 1949 as the Foto-fill. The barrel unscrews to reveal a sac surrounded by a metal casing which is depressed by hand for filling. The name was later changed to Aerometric. Similar filling systems were adopted by other manufacturers.

Type of filling mechanism in which the bladder and a pressure bar are exposed and the filling is done by squeezing the bladder to cause a suction.

The pen part under the nib that allows for flow of ink to the nib as air moves into the ink reservoir. Until recently, feeds were made of hard rubber. Today they are made from injection-molded plastic.

Pen trim, usually gold or gold-filled, consisting of one or more bands near the lip (end) of the cap. The bands both decorate and protect from cracks. Some wide bands were used for personalized engraving.

Many Sheaffer models were made with a wide cap band, often in 14k, to allow for the engraving of the owner's signature. These were known as autographs within their individual model lines.

An extremely rare and valuable Parker eyedropper filling pen with an Aztec Indian relief design. Made around 1911, only a half dozen or so are known to exist.