Immediately after WWII Omas reviewed its lines of pens and replaced the old Lucens/Extra Lucens plunger filling mechanism with the more modern and easier to use piston.

The new piston was used for a line of pens which retained the old design with the roller clip and the slightly tapered ends. They were marked simply "Omas Extra" on the barrel and were marketed in three sizes: 555 ( lady), 556 ( standard/senior ), 557 ( oversize). Colors for this model were jet black, gray pearl, arco bronze and arco gray.

This Omas Extra piston filler in gray pearl celluloid is an oversize model and it is offered in set with its matching pencil in a beautiful Omas Extra presentation box.

The pen is fitted with a superb Omas Extra nib which has an EF tip but a great flexibility and responsiveness.