Another of the pen models from ST Dupont is the Ellipsis and for this one a short digression into the vagaries of common languages. In English Ellipsis usually refers to the literary convention for omitted material, often the three consecutive periods. In this case though it is the feminine plural of ellipse.
The Ellipsis design followed the earlier ST Dupont Classique, Gatsby, Lady and Montparnasse products that had been their very successful entry into the luxury fountain pen world. Those designs had been fairly straight forward cylinders produced from the finest materials to the highest standards possible.
For the Ellipsis they chose mirrored sections of an ellipse, still very simple and attractive lines, understated form.
In this picture, the Classique and Gatsby models are on the far right while the Ellipsis are the two leftmost pens.