“The Pen with no joint to leak; no threads to break. The pen with the Lucky Curve. The success of the pen age. You cannot soil your fingers with a Parker Jointless.”
«Sour Look, soiled fingers and spotted clothes identify the man who did not use a Geo. S. Parker fountain pen.”
His invention of a «Jointless» fountain pen -without joints- added extra security to the use of these writing instruments. In late 1897 Parker was already producing the Jointless Lucky Curve.
The Parker Jointless were easily distinguishable at the base of the barrel as they have added a zero as first figure over the equivalent models with joint old style.