Any of a number of small pens designed for women, usually with ringtops for chains or ribbons. Ladies' pens have become increasingly collectible, but still represent a good value in the vintage pen market.

A blue color similar to lapis lazuli, a natural stone, introduced by Parker in 1927. There are patterns Lapis Blue on Blue and Blue on white.

a French-made Parker, small in size and shaped like a small 51 but with an exposed nib and a threaded cap. These are rare and considerably more valuable than their appearance might suggest.

Sheaffer was first on the bandwagon to offer a lifetime guarantee and used the term to designate both pens and nibs. Initially, the term was used only on the nib, but soon after the white dot was added to the pen body.

on Parker's early vacumatics, the filler plunger locked in the downward position with a twist enabling the blind cap to be small.

Parker patented a curved feed in 1894, which supposedly carried excess ink from the nib back to the reservoir preventing leakage. It became a logo for Parker until 1929.

Parker's name for brushed stainless steel used in the caps of 51s and later, 21s.